[BluffTHIS!]

You have not addressed the question of whether there should logically exist one true church/denomination. Read my earlier posts in this thread. And just because some abusive practices did indeed occur by immoral clerics, why would that lead to examination of doctrine?

Regarding dissenting catholics, their dissent in no way calls into question true doctrine. It just means they aren't people of integrity or they would just go join whatever protestant denomination best melds with their beliefs. I have stated before the reasons they don't do this which is they would no longer be the "progressive" darlings of the anti-religious media and would just be more protestant dissenters no longer worthy of news coverage.