You claim that Mao, Pol Pot, and Stalin (Atheist mass murderers) did not act based on their beliefs of Atheism, but rather for political reasons and greed. Although, that is a very poor argument to begin with, since any Christian or Muslim could use that same argument to defend Hitler or Osama Bin Laden as simply killing for political reasons, there is no restraint in Atheistic beliefs. One can do whatever they feel if he/she is an Atheist. The same can't be said about Christians or Muslims. Say if Stalin or Pol Pot were born into the Abrahamic faiths, and followed their teachings properly, the chances of them committing the genocides they have would have dropped by 90%. You can relate Atheism to the cavemen days, were people would kill each other since they had no guidance or source of righteousness. Myth: Atheists Can't Teach Right & Wrong to Kids, Can't Raise Moral Children. Are Atheists Poor Parents? Are Atheists Unable to Teach Morality?