Perhaps in all of history but not the last 100 years. It hasn't just been the killing but the inhumane treatment of others by those who dismiss G-d preferring to dominate as men who pretend themselves to.be G-ds.
Wealthy and famous author, Ernest Hemingway, wrote in one of his books, "Every thinking man is an atheist."
Years later, after four marriages and three divorces, he put his shotgun in his mouth and pulled the trigger, this "thinking man." He gave no thought to his wife finding his brains all over their living room.
“One hundred years from my day, there will not be a Bible on earth except one that is looked upon by an antiquarian curiosity-seeker." -Voltaire, in 1776 (1694-1778)
