All still pale in comparison to even just one Atheist psycho like Stalin or Mao.
Operative word is "psycho", PSacramento, the adjective is irrelevant. It is important to separate the evil intentions of men like Stalin and Mao from the vast power they weilded in achieving them. Both men had twentieth century technology at their disposal. Do you think the Crusaders would have hesitated one second from completely vaporising the millions in Islam if they had the atomic bomb at their disposal? How naiive.