As far as the Cekadian "infallibility of theologians" poosition, it's absurd on the face of it.
From about 400-1100 (about 700 years), "all theologians" taught the position of St. Augustine that unbaptized infants go to Hell and suffer there. It wasn't until Abelard began questioning it that the issue was reconsidered, and the Church side with Abelard, against 700 years of unanimous theological teaching (look it up in Catholic Encyclopedia). [As an side, Abelard also rejected BoD.]
So, then, for 1500 years, the Church unanimously and dogmatically taught that explicit faith in Jesus Christ and the Holy Trinity were necessary for salvation. What gave the right to those 16th century theologians to throw that out? If that wasn't an infallible teaching of the OUM, then there's no such thing, unanimously taught by the Church Fathers, and "always and everywhere".
If theologians are infallible, I ask the Cekadans to cite more than one theologian who did not approve of the teachings of Vatican II (no, +Lefebvre was not a theologian). +Guerard des Lauriers was the only one, the lone voice. There was a unanimous consensus and approval of Vatican II by ALL the theologians of the Church. So where did the infallibility of theologians go then, eh, Father Cekada?
Father Cekada stated at one point that he couldn't accept that fact that all infidels are lost ... for emotional reasons, because he couldn't believe that all those natives of the Americans were lost until they were discovered by the missionaries. So it's OK for Cekada to reject 1500 years of unanimous Catholic teaching? At what point exactly did it suddenly become OK to question that teaching, and what happened to the infallibility of theologians for the first 1500 years of Church history.
As I've said, my battle is not with BoD per se (I disagree with it and reject it), but if someone wanted to believe in it, within its proper limits (aka Catechumens), I'm not going to argue with you too much. But those who start alleging that non-Catholics can be saved, then that's when the knives come out. It's heresy, pure and simple.