Being an atheist doesn't make you positively more moral, it is more the fact that you will by definition be without religious beliefs, beliefs that can often be immoral, and are always delusional/superstitious because they lack evidence. And like DLF says (and said very well I might add) - it's more to do with the fact that us atheists are not limited by the beliefs of religion, we can just use our brains without that stuff.
It's not that the religious are necessarily bad people, or that atheists are necessarily good - it's more to do with the fact that religion itself is an evil, a lot of evil can stem from it - and you don't get those quite possibly - at least potentially - harmful beliefs driving you when you're an atheist. It says nothing of the character of whether a person is moral or not deep down, it says of what drives them - atheists are not driven by religious dogmas (by definition). They can still have other 'evil' ideologies driving them of course, but it's just one less nasty belief driving you - and IMO, religion is the big one out of the nasty belief systems. I agree with Chirstopher Hitchens (among others) that it's the greatest source of evil in the world.
EvF
It's not that the religious are necessarily bad people, or that atheists are necessarily good - it's more to do with the fact that religion itself is an evil, a lot of evil can stem from it - and you don't get those quite possibly - at least potentially - harmful beliefs driving you when you're an atheist. It says nothing of the character of whether a person is moral or not deep down, it says of what drives them - atheists are not driven by religious dogmas (by definition). They can still have other 'evil' ideologies driving them of course, but it's just one less nasty belief driving you - and IMO, religion is the big one out of the nasty belief systems. I agree with Chirstopher Hitchens (among others) that it's the greatest source of evil in the world.
EvF