Christianity/Islam/Atheist/Communist. Makes no difference. All have long histories of murdering people who don't follow the specific tenets of the time. Christians are no better than Muslims and Atheists like Stalin and the Soviet Union when Communism reigned all MURDERED people who did not buy the religious party line of that time. So it isn't whether you are religious or not that governs anything. It is whether you are humane and sane. Isn't it? Just a few examples
The Crusades (Christian)
Jihads (Islam)
The Inquisition(s) (Christian)
Holocaust (Christian)
Muslim Conquests (Islam)
KKK Murders (Christianity)
Genocide of Native Americans (Christianity)
9/11 (Islam)
Armenian Genocide (Islam)
What a sad history.