Is religion the cause of evil?

According to Nietzsche, as my relativly young mind understand him, the majority, the stupid, the weak, the last man, is the creator of evil by choosing their enemy in the Übermensch out of jealousy etc. They decide that the Übermensch is "evil", just because he is.

I'm not trying to discuss Nietzsche here, though I'd like to do that sometime aswell.

My point being, religion may not be the cause of all war (but has a part in that aswell), but the creator of the "us & them" (good & evil) attitude, which itself is the reason for most wars. Discuss...

__________________
[I]It is dangerous to be right in matters where the established society is wrong.[/I]

[I]God is the immemorial refuge of the incompetent, the helpless, the miserable. They find not only sanctuary in His arms, but also a kind of superiority, soothing to their macerated egos: He will set them above their betters.[/I]
- Henry Louis Mencken