If I may add, where you see schism, others see counterrevolution. Obedience to injustice is not true obedience; “Take this prisoner out and shoot him.” Obedience to injustice is also an injustice.
The pope, for better or worse IS the pope. If some cardinal archbishop makes a fool of himself celebrating perversion it would not be the first time nor likely the last. I would suggest Leo Cardinal Suenens and Joseph Cardinal Bernardin and Roger Cardinal McPhony likely were each guilty of far worse.
What constitutes justice or injustice is likely beyond any authority of yours.
It is not whether you or I see schism or counterrevolution (did someone authorize your counter-revolution against legitimately constituted Church authorities?) but rather the fact that St. John Paul II rightfully declared Marcel and his SSPX friends to BE IN SCHISM. If that does not constitute an obligation of assent imposed upon you, what makes you any different from the Reformers, from the others who have resisted papal authority through the 20 centuries since Jesus Christ created the papacy in Peter not some obscure stiff-necked French cleric bound and determined by his fantasies of grandeur to rebel against Christ's Vicar on Earth.
Oh, and what was the injustice? That Saint John Paul II saw no reason to obey the French pipsqueak???? PUHLEEEEZE!
What's next? Here I stand, I can do no other?
Dead, excommunicated Marcel!