One of the grand fallacies I'm seeing in this is the notion that what happened is an Christian or Catholic failing. It is not.
...snip...
I have to strongly disagree with you, if you read the Ryan Report you will see that there was a rationale that arose directly from the RCC beliefs about the children being sinners (because they were born out of wedlock and so on) and therefore needed to be "punished" (what we would identify as abuse) to (presumably) save their souls. I believe that a lot of the people perpetuating the abuse identified in the Ryan Report (which went beyond looking into sexual abuse) sincerely believed that what they were doing was for the benefit of the children based on their religious beliefs.
A church (not just the RCC) that has doctrines that state there is a god that loves you but will still punish you forever is setting up a situation that can excuse the most terrible abuse being inflicted for the sake of the child's soul.
Now of course there is a matter of human behaviour - that is why I wear the signature that I do - but the RCC is also part of that behaviour.