It is sad fact of life that religion is so ingrained all around us that we never even question why religious beliefs are considered sacrosanct. Religion has always been the worst nightmare for mankind. From holding back science in the dark ages to the great cruelties that the Christian missionaries inflicted on indigenous population nothing has causes mankind more harm than this delusional belief that there some God who has created this life and there is a heaven or hell to go to when this life is over. Qualitatively there is no difference between the perpetrators of 9/11 and people who bomb abortion clinics. This belief in God allows man to commit intolerable cruelties to his fellow men as long as they have been sanctioned by God. People are already on the slippery slope to dogma once they accept as fact something which has no evidence. Once this first step is done it is not long before you can be convinced to kill in the name of God.

I pretty much agree. In the context of history, the number one killer in the animal world is disease. In the world of man, the number one killer is differences in faith.