That's a tough one! NOT!
It could be the shameless hypocrisy, the arrogant self-righteousness, the willful ignorance, or the cynical indoctrination and poisoning of young minds with prejudice and hate. It's difficult to say, exactly. We'd say, all of the above!
We do know that, given half a chance, religion would control every aspect of our lives whether we want it to or not. It would impose an absurd morality on us, telling us what to think, what to believe and who to attack and kill for believing something else. Don't forget religion's anti-science and common sense stance.
Thus, religion is the natural home of the psychopath.
I've answered the question from my point of view. What do the rest of you think?