- Angelo Roncalli was a suspected heretic pre-election and a confirmed heretic post-election; he never became pope. None of his acts were valid or could ever become valid.
- The 1958 college of cardinals was disqualified from ever electing another pope (Can. 2391§1).
Also. Roncalli was declared suspect of heresy twice. And did not defend himself within six months making him a legally sentenced heretic.
Why not go back before John XXIII? Pius XII did much more damage to the Church than John XXIII ever did:
He wrote the first modernist encyclical in 1943: "Divino Afflante Spiritu" (which is referenced in the beginning of most Novus Ordo bibles --they love it so much).
He allowed the Pian psalter to be put into the Bible in 1945.
He made Opus Dei a part of the Church in 1950.
He allowed Bugnini to butcher the Easter Vigil in 1950 and then allowed Bugnini to butcher the Holy Week masses in 1955... while it was John XXIII who wisely removed Bugnini from his position but Paul VI later brought Bugnini back to continue his destructive activities.
He also was the one who first "officially" permitted the Dialogue Mass in 1958.
These are just "some" of Pius XII's major screw-ups. We can even go back further than that to Pius XI betraying The Cristeros, Pius X butchering the Divine Office and Leo XIII allowing Cardinal Rampolla to do his destructive activities. Where do we stop?
Ibranyi, when it comes to papal criticisms, goes all the way back to 1140 (he should just become Eastern Orthodox at this point) and Matatics, with his papal criticisms, is just a home-aloner with no where to go (despite the fact that he agrees with most Sedes that Pius XII was the last pope) because he claims all clergy, Sede clergy included, are illicit clergy and thus all masses are illicit. If we keep criticizing, we will end up being "trapped in a dead-end!" I doubt anyone wants to be like either one of those two guys.
My point is that we should either STOP criticizing altogether or, if we do criticize, apply the same standards to ALL...true or false popes. Thus we can't criticize John XXIII without applying the same standards to Pius XII (regardless of the fact that Pius XII was a real pope and John XXIII a false pope).