Christianity has killed the least. You have to do more research.
How many have died in Hindu vs Muslim wars?. There are no proper records. 
If you believe in Mahabharat war, do you know how many people were killed?
Atheists have killed more than religion if you exclude the Mahabharat war.

Didn't your god wipe out the entire humanity from the face of the earth with his great flood? I mean that is something, isn't it? And here we are debating how many got killed in hindu/muslim and mahabharat conflicts.

Your god has serious issues with humanity dude. I mean he is a mass killer of biblical proportions. Stalin, mao,, polpot ain't got nothing on your christian god when it comes to killing.

There, I have proved that you christians are savages and have killed more than any other people.

And all the arguments that you will present to contradict it are INVALID.