B&B, yes it would take a very long time to address each individual religion and the aspects within it... and they all have something in common, blind faith and doctrine.
I assume you're referring to Hitler above? That's a common mis-conception, he was a Roman Catholic. The Nazis wore "Got Mitt Uns"on their belt buckles (God With Us), Hitler spoke extensively about his religion in Mein Kampf, and on many occasions addressed the nation in public speeches declaring his religion to them.
Aside from that, the whole thing is again a common argument which demonstrates how little research you've done into it, as it's covered as pretty much the basics... you would have to not look, in order to not find it. What I'm referring to there, is that such atrocities by for example, Stalin, were not committed because of his atheism, or in the name of atheism. The above mentioned "issues" that are committed by religious people, are because of their religious beliefs, in the name of their religion.
Back with the insults I see, is it common place for you to say anybody who disagrees with you is not intelligent, despite the fact that they are having (or attempting to have) a civilised debate with you, bringing up various points that are likely seen by many as valid, or is it only the people you struggle to argue with because they are able to point out the flaws in your arguments and lack of research so easily. One might go so far as to say it's an insecurity, maybe your just projecting your subconscious doubts of your own intelligence, or lack thereof, onto others. Mine is however not the place to say though... after all, I don't know you and so wouldn't propose to have so full an understanding of you to know your capabilities with the certainty that you seem to know mine.