People who don't believe in religion are so angry at people who do. Why is that? Jealousy? I don't know...it always amazes me the level of rage it illicits.
I think its because religion requires that you follow a rule and give up a little bit of your freedom to do so. But giving up these kinds of freedoms (licentiousness) is actually for the greater good. Nobody's perfect, but some people are more conscientious at it than others and its just jealousy, resentment.
Not sure why. Good question.