"Christianity is the religion of peace."
Except for those parts of the Bible where God commanded people to sack and destroy entire cities, rape and pillage, take slaves, kill children, and then wiped out the entire world in a flood. That's a religion of peace?
When you considering that most of the people in America identify themselves as Christians, or at least profess a belief in God, that means a majority of killers are also Christians.
I'll remain an atheist.