You wrote:
“After all Catholics never break rules. Those priests were permitted to molest those children....Or perhaps rebellion is common to fallen Man?”
Sinfulness on the part of many does not legitimize heresy or rebellion on the part of some.
Actually, it does. The great corruption of the Catholic church from its inception as a government body in the time of Constantine, through the middle ages led to rebellion against the Church, not against G-d. With work, the Church eventually reformed, and now provides one (of many) paths to G-d and virtue. The church does its best work when it has competitors who are virtuous and holy, and thus competition is for the most virtuous. By contrast, if rebellion was not permitted, well, G-d gave us minds to permit us to question.
“I doubt, therefore I think” as Descartes said.