Across the history of man the greatest mass killings of people were instigated by atheists e.g Stalin who murdered millions simply because they were Christian.

Across the history of man the greatest mass killings of people were instigated by atheists e.g Stalin who murdered millions simply because they were Christian. Most wars are tribal fights where the religion correlates to the tribe and it has little to no effect on causing the war. You even said yourself that it does the opposite, it placates it.