It has been done before and will likely be done again... 

From the fromrome.info website, a website run by a 'Brother' (it is my understanding the title of Brother is self-imposed) Bugnolo, who has for several years now been advocating one extreme solution after another to the problem of the Conciliar popes. This is this groups second attempt to elect a pope... 

It is not without amazement that one sees that the Vatican is asking for those members of the SSPX who wish to 'reconcile' with the Vatican after the excommunication of the SSPX's now six bisops by accepting the Vatican's 'Profession of Faith and Formula of Adherence' are nearly identical to the concessions of Bp. Fellay in the Doctrinal Declaration of 2012!

Firstly...

• find a bishop, a major superior of a clerical pontifical institute or another ordinary who is willing to accept him ad experimentum,
  
• write a letter to Pope Leo XIV requesting the remission of the censures incurred by receiving priestly ordination from an excommunicated or canonically irregular bishop, and
  
• attach documentation of his priestly ordination and a Profession of Faith and a Formula of Adherence, as well as a letter signed by the ordinary explaining their willingness to accept the priest.
  

Quote:With firm faith, I also believe everything contained in the word of God, whether written or handed down in Tradition, which the Church proposes as divinely revealed, whether by solemn judgment or by her ordinary and universal Magisterium.

I likewise firmly accept and hold each and every teaching definitively proposed by the Church regarding faith and morals.

Moreover, with religious submission of will and intellect, I adhere to the teachings which either the Roman Pontiff or the College of Bishops proclaim when exercising their authentic Magisterium, even if they do not intend to proclaim them by a definitive act.

Quote:I accept the doctrine taught in No. 25 of the Dogmatic Constitution Lumen Gentium of the Second Vatican Council concerning the Magisterium of the Church and the adherence owed to it.

With regard to certain doctrines taught by the Second Vatican Council, or subsequent reforms in either the Sacred Liturgy or Canon Law, which may appear to some to be difficult to reconcile with previous declarations of the Magisterium, I undertake to follow a positive approach to their interpretation under the guidance of the Church’s Magisterium, so that none of these teachings may be separated from the remainder of the Church’s sacred doctrinal patrimony.

I further declare that I accept the validity of the Sacrifice of the Mass and of the Sacraments celebrated with the intention of doing what the Church does, and according to the rites contained in the typical editions of the Roman Missal and the ritual books promulgated by the Supreme Pontiffs Paul VI and John Paul II.

Finally, I promise to adhere to the common discipline of the Church and to her laws, especially those contained in the Code of Canon Law promulgated by Pope John Paul II.

Benedict XVI: "Places of worship, like this splendid Al-Hussein Bin Talal mosque, stand out like jewels across the earths surface. They all point to the divine."


Video: https://gloria.tv/post/1BLgSg1a9JUB2iDuhBQzudb8B


See also: Benedict XVI’s Second Visit to a Mosque





Vs. Archbishop Lefebvre's Warnings Against Ecumenism:

• “Ecumenism is not the Church’s mission. The Church is not ecumenical, she is missionary. The goal of the missionary Church is to convert. The goal of the ecumenical Church is to find what is true in errors and to remain at this level. It is to deny the truth of the Church.” (April 14, 1978)
  

• “… and this, it is really the modern heresy, that we can really designate under this new term, for it really seems that there is a new heresy in addition to modernism, liberalism, and all those old errors, it seems to me that we can define this modern error: ecumenism, this false ecumenism.” (Conference at Econe, May 16, 1978)
  

• “Then came this abominable ecumenism which is nothing but the means to penetrate liberal ideas within the Church, because it is the principle of Religious Liberty, a principle which is in the constitution, in the Declaration of Human Rights.” (Conference, December 21, 1984)
  

• "We want to be in perfect unity with the Holy Father, but in the unity of the Catholic Faith, because there is only this unity that can unite us. But not this kind of ecumenical union, a sort of liberal ecumenism, because I think this is what best defines modern tendencies and what we could almost express as the 'modern heresy.' As I had the occasion to say in Essen, I think that what best defines the whole crisis in the Church is really this liberal ecumenical spirit. I say liberal ecumenism because there is a certain ecumenism that, if properly defined, could be acceptable. But liberal ecumenism, such as is practiced by the present Church and especially since Vatican II, necessarily carries true heresies." (Conference of April 14, 1978)
  

• “The Church, in the course of the 1960's, thus during the Council, acquired values that have come from outside the Church, from the liberal culture - due secoli - from two centuries of liberal culture. It is clear: these are the "rights" of man, it is Religious Freedom, it is Ecumenism. It is Satanic.” (Conference, December 13, 1984)
  

• “In this world, there are forces opposed to Our Lord, and to his reign. Satan and all the auxiliaries of Satan, conscious or unconscious, refuse this reign, this way of salvation and fight for the destruction of the Church. Thus the Church is engaged by her Divine Founder in a gigantic combat. All means were and are employed by Satan to triumph. One of the last, extremely efficacious stratagems is to destroy the combative spirit of the Church by persuading her that there are no more enemies, and that we must put down our arms and enter into a dialogue of peace and cordiality. This fallacious truce will permit the enemy to penetrate everywhere and corrupt the forces of the Church. This truce is liberal ecumenism, a diabolical instrument of auto-destruction of the Church. This liberal ecumenism will result in the neutralisation of the arms which are the liturgy with the Sacrifice of the Mass, the Sacraments, the breviary, the liturgical feasts, the neutralisation and ceasing of the seminaries…” (Archbishop Lefebvre to Cardinal Seper)
  

• "The enemy of Ecône is not Such-and-Such, at the Vatican or elsewhere. The enemy of Ecône is Liberalism, the destroyer of the Church. And as to the men who serve this liberalism and who aim to cut us down, these are not our personal enemies – they are only pawns of liberalism. One must understand this: Our battle is not a confrontation between persons and characters. It goes well beyond: it is the battle of faith against error." (Vatican Encounter: Conversations with Archbishop Marcel Lefebvre, by José Hanu)
  

• Jesus is not optional. “Qui non est mecum, contra me est—He that is not with Me is against Me” (Mt. 12:30). To deny this is the fundamental error of religious liberty and ecumenism. Lefebvre, Marcel, Spiritual Journey. Kansas City: Angelus Press, E-Book
  

• And by this very fact, this “Mystery of our Faith” [the traditional Mass] overwhelms all the errors of Protestantism, Islam, Judaism, Modernism, and materialistic, socialist and communist secularism. No error can withstand our holy Catholic Mass. The Mass is anti ecumenical, in the sense of ecumenism practiced since the Council: namely, the union of all religions in an amalgam of prayer without dogma, without morality, without specific laws, and agreement based on a few ambiguous slogans like “the rights of man,” “the dignity of man,” “religious liberty.”  On the contrary, the Novus Ordo is precisely the banner of this false ecumenism, representing the annihilation of the Catholic religion and the Catholic priesthood. (Letter to Friends and Benefactors, February 1982)
  

• Satan, the father of lies, as Our Lord Jesus calls him, has the extraordinary talent of finding out some words, to which he assigns a new meaning so that from their ambiguity, he achieves acceptance of the destructive falsehood which overthrows the best established societies. He found it in this “ecumenism” of the Council which has created an ecumenical liturgy, an ecumenical Bible, and ecumenical catechism, uniting truth and falsehood – marrying the true and the false. The most disastrous result of this marriage is the Catholic-Protestant Mass, the poisoned source afterwards yielding countless ravages: relinquishment of the Church, of the true Faith, sacrileges, tearing of the unity of the Church, proliferation of diverse sorts of creeds unworthy of the Church.
  
  But, there exists a consequence of which one does not often enough ponder on. It is the destruction of the Catholic nations which no longer find in the Holy Mass, the source of political unity based on the unity of the Catholic Faith. Therefore, the Catholic nation hereafter must, in like manner, convert itself to an ecumenical state – pluralistic, very soon finding itself securalized and neutral, if not atheistic. The ecumencial Mass leads logically to apostasy. One cannot serve two masters, one cannot nourish oneself indifferently from truth or falsehood. It is falsehood that flatters our evil inclinations which will prevail over truth which is more austere and more demanding. One must, at all costs, remain bound to truth without mingling. Pope Pius IX vigorously denounced these liberal Catholics who believe they can unite falsehood and truth, good and evil, in order to please their contemporary fellowmen. Whether this poisoned ecumenism reaches us through the hierarchy or not, the channel is not important – it is the poison that one must refuse to swallow. It is a matter of strict obedience to our Lord Jesus Christ, to the Church of all times, to all the successors of Peter. We will, therefore, keep the Catholic liturgy, the Catholic Bible and catechism. ... Each one, at his time in the Church, must endeavour to remain Catholic and to maintain the Catholic Church. It is upon this resolution and its realisation that we will be judged by Our Divine Lord. (Letter to Friends and Benefactors, March 1978)
  

• Because we are surrounded by the ruins caused by the corruption of minds and hearts, the evidence of the vitality of the Church of all time takes on a priceless value. We are permitted to hope that we can restore destroyed altars, that we can offer again the true Sacrifice of the Mass. By contrast, when one lives with an ecumenical Eucharist, democratic and liberal, the auto-destruction continues, despite all the calls to order, the statements most worthy of respect and the most spectacular of ceremonies. “Nisi Dominus aedificaverit domum in vanum laboraverunt qui aedificant eam – If the Lord does not construct the building, the builders work in vain.” Therefore, the altar of sacrifice of propitiation, the heritage of the new and eternal testament; the Body and Blood of Jesus are the foundation stone of the Church from whence gush the waters of eternal life. (Letter to Friends and Benefactors, October 1979)
  

• Through Religious Liberty we’ve ended up with Ecumenism, and through that all the ‘reforms’ which have been carried out in the Church, the introduction of Collegiality to please the Protestants and the democratic spirit of our age. Everything came through this acceptance of Religious Liberty and the principles of the modern world. It’s clear, and if we don’t keep that in mind, we cannot understand what took place behind the scenes at the Council, nor what happens today behind the scenes in the Vatican. ... Our Lord came to earth to institute the true religion. There is only one religion. Those who have not converted to it will not be able to enter heaven. Our Lord said to His Apostles: “Go, teach all nations.” He didn’t say: leave the Buddhists alone, the Muslims, the pagans, leave them be. They each have their own religion, no need to bother them. The missionaries went out, they were killed, they shed their blood, they became martyrs. (Archbishop Lefebvre, Conference in Madrid, 1986)