Christopher Hitchens famously (and rather politically incorrectly) said:

> Whenever I hear some bigmouth in Washington or the Christian heartland banging on about the evils of sodomy or whatever, I mentally enter his name in my notebook and contentedly set my watch. Sooner rather than later, he will be discovered down on his weary and well-worn old knees in some dreary motel or latrine, with an expired Visa card, having tried to pay well over the odds to be peed upon by some Apache transvestite.

I don't understand the psychology either, but people compartmentalize and rationalize. One line of thinking might be that everyone is a fallen sinner, even priests, and so long as they repent and guide their flock in the right direction, they will be forgiven.