A peculiar feature of The Soviet Union and Maoist China is that they suppressed religion. As far as I’m aware, those two ideologies have the largest body counts ever recorded.
Both of those examples were effectively a religion-as-state with their state heads elevated to the status of gods.
I don't think all that many non-religious people actually care/object when religious people practice their religion as long as it doesn't infringe on anyone else's rights.
You edited your reply ;). Replying to the first edit, You mean that The Flood took longer to kill everyone who wasn't on The Ark?
And to your second edits meaning: I also like to stick to facts, but I was replying to Christians claiming that non-godly people are more evil than godly people by pointing out how nasty they believe God to be.
Ww2 killed 60-80m and that was caused by Hitler who was Catholic (although he didn't kill in the name of religion).
Of course other things God supposedly created have killed far more, such as Spanish Flu which killed 500m and The Black Death which killed 30-60% of everyone in Europe.
