I'm going to steal your response and repeat it often. It kinda reminds me (though not directly) of the Astrophysicist who said, "without religion, humanity has "bad" people doing bad things and "good" people doing good things. For a "good" person to do a bad thing he/she must be influenced by religion".
With or without religion, good people can behave well and bad people can do evil; but for good people to do evilthat takes religion.
The quote is from Weinberg's essay, "A Designer Universe?".