The truth of the matter is that Pope Liberius was being tortured when he was forced to sign a condemnation of the Saint which renders it null and void in the minds of any but the strongest supporters of Mons. Lefebvre and those who succor the SSPX Schism, Lefebvre is another Athanasius and he alone saved the Church.
Um, no. He was not an other Athanasius and he did not save the Church.
Mons Lefebvre was not unjustly excommunicated by a Pope who was being held captive and tortured by an Emperor and whose condemnation/excommunication was, by Saint Athanasius his own self, credited to the Arians and not to Pope Liberius.
Sorry, but that is not true history (more on that below) but let's begin by noting (his being tortured having strangely gone unmentioned by Bishop Athanasius) that, in fact, Pope Liberius is a Saint and not a heretic.
See Denzinger's "The Sources of Catholic Dogma, specifically the entry between 57 c and 58 for this is what it reads:
St Liberius 352-366
http://theradtrad.blogspot.com/2014/03/st-liberius-pope-of-rome.html
http://theradtrad.blogspot.com/2014/11/the-heretical-pope-tradistan.html
http://www.papastronsay.com/resources/PopeLiberius/Rohrbacher.htm
Here is the Short version of the Saint Liberius- Saint Athanasius story:
http://www.unamsanctamcatholicam.com/component/content/article/79-history/559-obedience-of-athanasius.html
Here is a very very long version of the history.
39. Liberius's speech to Constantius
For after the Emperor had frequently written to Rome, had threatened, sent commissioners, devised schemes, on the persecution subsequently breaking out at Alexandria, Liberius is dragged before him, and uses great boldness of speech towards him. 'Cease,' he said, 'to persecute the Christians; attempt not by my means to introduce impiety into the Church. We are ready to suffer anything rather than to be called Arian madmen. We are Christians; compel us not to become enemies of Christ. We also give you this counsel: fight not against Him who gave you this empire, nor show impiety towards Him instead of thankfulness ;'persecute not them that believe in Him, lest you also hear the words, 'It is hard for you to kick against the pricks Acts 9; 5.' Nay, I would that you might hear them, that you might obey , as the ]holy Paul did. Behold, here we are; we have come, before they fabricate charges. For this cause we hastened hither, knowing that banishment awaits us at your hands, that we might suffer before a charge encounters us, and that all may clearly see that all the others too have suffered as we shall suffer, and that the charges brought against them were fabrications of their enemies, and all their proceedings were mere calumny and falsehood.'
40. Banishment of Liberius and others
These were the words of Liberius at that time, and he was admired by all men for them. But the Emperor instead of answering , only gave orders for their banishment, separating each of them from the rest, as he had done in the former cases. For he had himself devised this plan in the banishments which he inflicted, that so the severity of his punishments might be greater than that of former tyrants and persecutors. In the former persecution Maximian, who was then Emperor, commanded a number of Confessors to be banished together , and thus lightened their punishment by the consolation which he gave them in each other's society. But this man was more savage than he; he separated those who had spoken boldly and confessed together, he put asunder those who were united by the bond of faith, that when they came to die they might not see one another; thinking that bodily separation can disunite also the affections of the mind, and that being severed from each other, they would forget the concord and unanimity which existed among them. He knew not that however each one may remain apart from the rest, he has nevertheless with him that Lord, whom they confessed in one body together, who will also provide (as he did in the case of the Prophet Elisha 2 Kings 6:16) that more shall be with each of them, than there are soldiers with Constantius. Of a truth iniquity is blind; for in that they thought to afflict the Confessors, by separating them from one another, they rather brought thereby a great injury upon themselves. For had they continued in each other's company, and abode together, the pollutions of those impious men would have been proclaimed from one place only; but now by putting them asunder, they have made their impious heresy and wickedness to spread abroad and become known in every place.
41. Lapse of Liberius
Who that shall hear what they did in the course of these proceedings will not think them to be anything rather than Christians? When Liberius sent Eutropius, a Presbyter, and Hilarius, a Deacon, with letters to the Emperor, at the time that Lucifer and his fellows made their confession, they banished the Presbyter on the spot, and after stripping Hilarius the Deacon and scourging him on the back, they banished him too, clamouring at him, 'Why did you not resist Liberius instead of being the bearer of letters from him.' Ursacius and Valens, with the eunuchs who sided with them, were the authors of this outrage. The Deacon, while he was being scourged, praised the Lord, remembering His words, 'I gave My back to the smiters Isaiah 50:6;' but they while they scourged him laughed and mocked him, feeling no shame that they were insulting a Levite. Indeed they acted but consistently in laughing while he continued to praise God; for it is the part of Christians to endure stripes, but to scourge Christians is the outrage of a Pilate or a Caiphas . Thus they endeavoured at the first to corrupt the Church of the Romans, wishing to introduce impiety into it as well as others. But Liberius after he had been in banishment two years gave way, and from fear of threatened death subscribed. Yet even this only shows their violent conduct, and the hatred of Liberius against the heresy, and his support of Athanasius, so long as he was suffered to exercise a free choice. For that which men are forced by torture to do contrary to their first judgment, ought not to be considered the willing deed of those who are in fear, but rather of their tormentors. They however attempted everything in support of their heresy, while the people in every Church, preserving the faith which they had learned, waited for the return of their teachers, and condemned the Antichristian heresy, and all avoid it, as they would a serpent.
Many soi disant trads continue to promote this wicked lie about Liberius and Athanasius for obvious reasons - to succor the SSPX schism.
A schism has always been condemned and denounced by all Church Fathers and one can not find any defense in Tradition for schism until Mons Lefebvre came along and claimed he was saving Tradition.
Defense of a schism is a novelty of far too many Trads and it is a continuing scandal.