A Pox on Both Your Houses

This Cracked piece by David Wong, "10 Things Christians and Atheists Can (And Must) Agree On", is a couple years old but still a worthwhile read.

1. You Can Do Terrible Things in the Name of Either One

We're putting aside the question of which belief system has killed more people by percentage of population, or whether a hypothetical world without religion would have seen fewer or more genocides than ours. We're not going to open a spreadsheet and try to count which belief system manufactures more murderous sociopaths per capita.

All I need from you is agreement that it's entirely possible for either an atheist or theist world to devolve into a screaming murder festival. The religious leader sends his people into battle because he thinks God commanded it, the Stalins and Maos of the world do the same because they see their people as nothing more than meaty fuel to be ground up to feed the machinery of The State. In both cases, the people are equally dead.