Atheists more moral than theists? what say you?

I don't know, maybe you should ask a famous Atheist like Joseph Stalin or Mao Zedong? They'll tell you how moral atheist are. But then again, Theists have killed hundreds of millions. The crusades, the Spanish Inquisition, Hitler was a Theist, the Genocide of the American Indians, between 75-100 million dead, it was the biggest Genocide in human history, committed by Christians. It's hard to say who is more moral. Atheists and Theists both have lots of moral and immoral people, it's hard to say. Religion teaches people to be moral, but they don't always follow their religion the right way,look at Al-Qaeda.