huh? Hitler was not an atheist, by all accounts, he was a devout Christian, although not a Catholic nor a Protestant. He frequently expoused a belief in a higher Creator, one that has ordained him to do his work. This belief was not just echoed in speeches but also in his personal writings, meant to viewed by only his closest confidants. I don't know how Hitler = atheist meme got started, but it flies in the face of historical fact.
Now Stalin was a devout atheist, so you can count that towards the ticker if you want.
On the whole, religion in general has been responsible for more human suffering than
atheism. Likewise, religion, in general, has been responsible for more good than atheism. So take that as you will.