Atheists & Agnostics

... that, to some degree at least, many of the most horrific crimes in human history were perpetrated by the über-religious against those who did not share their unswerving obeisance to an imaginary deity on high that knows all and sees all.
Those that harbor such apocalyptic beliefs still walk among us, and are certain that their Sky Daddy not only forgives homicidal acts committed in His name, but encourages them, at least in their fevered minds. History records far too many instances of this for it to be dismissed out of hand. The Spanish Inquisition comes to mind, and the Crusades were pretty uncomfortable for those facing the business end of a "Christian's" lance. More recently, there was Jim Jones, and David Koresh. And today's Christian Nationalists are an unforgiving lot who have preached death and destruction upon those who don't bend the knee to their dictates. The list is long and soaked with the blood of innocents.
H.L.Mencken is reputed to have summed up the point pretty concisely with: "Religion is the greatest fomenter of hatred and intolerance in the history of humanity."
So there's that.