Which scales?
Are atheists killing each other to prove who's the best atheist?
Perhaps then you'd have a point.
Jews, Christians and Muslims are all part of the Abraham religion and believe in the same God, but are adamant to kill each other because they can't agree who God's best prophet was.
But sure. Atheist participated in wars.
I'm glad you're brought that up since nobody questioned it or denied it happening.
Hillary was in more danger dodging sniper fire on the tarmac than Trump has ever been at any point in his entire life.