There is a clear contradiction in being in communion with an heretic, even the Pope. Some try to save the position by saying Jesus deposes the Pope. Here's why that only creates more contradictions.
Papal Supremacy Series: The Church as Sacrament
Tag: Pope Benedict XVI
What Even is the Lex Orandi?
Benedict XVI saw both the Novus Ordo and the TLM as equal expression of the "lex orandi". Francis teaches only the Novus Ordo? Who is right? And what even is the "lex orandi"?
Apologia Anglicana 