I've probably had little too much red wine to do it justice tonight, but seriously read The Grand Inquisitor, it might even be online and it's pretty interesting. It has a very cynical and nasty view of human nature which I don't agree with, but there's a shadow of truth in it. People (many people, anyway) want "the answer", they want there to be one answer that they can learn and then give up searching. When an institution (whether the Catholic Church or the Communist Party or anything in between) offers "the answer" it's attractive; to be able to commit to something, to know that you're right, to have the difficult questions answered so you never need to worry about how to act in complicated situations. It's an attractive proposition and I think that everyone probably has some small part of them that wants to find that somewhere, some people think that they have found it in Catholicism, or any other strong ideology.