Would for to have phrased it;
I do not wish to trash, or even to question the overall theology in toto.
Yes, the Protestant heresies are indeed a product of Catholicism and we remain somewhat responsible for them. Perhaps one day a pope should issue an apology for all the harm that the so-called reformation had caused the mankind. The Protestants should, indeed, realize that their beliefs are nothing but an unfortunate corruption of valid Catholic beliefs. The same cannot be said for Protestantism: while I recognize that many Protestants have sincere faith, I do not see anything of value in any distinctly Protestant doctrine.