I think there are a lot of Christians who can't forget all the atrocities and blood spilled through regimes claiming to have gotten rid of God. We hear about the "Millions of people burned at the stake or hung during the Witch Trials". I had someone who was a atheist telling me how the Puritans were responsible or killing "tens of thousands of people", if only 150 people were in prison and less than 40 were killed, where did the additional numbers come from?
The second area that troubles me, if the totals are carried in to Europe, that add to 200,000 to 300,000 depending on your sources you used. If 250,000 were killed during the Inquisition, as one author noted that's 250,000/ 300 years. The numbers on the Crusades don't add up to 100s of Millions, where are all these numbers coming from? The Crusades and Inquisitions don't add up to 100 Million, where are these numbers from? The Children's Crusade's was the worst by far, and still I can't find sources showing the massive numbers given by people.
It bothers the atheist when people try to bring in Mao, Pol Pot, Stalin and many more Regimes consolidating power under their godless Communistic Regimes. More people were killed under these regimes than Religious Regimes according to different sources.
How are we suppose to look at the 67 million to 75 million (Russians).
China had it's own share, it's about 50 to 65 million to, the United States Senate had a report done and they estimated near 65 million in China.
Cambodia killed off 1/3 of it's population, how are Christians and religious people suppose to forgive the groups that allowed Mad Men like these to take control and kill more people in the name of "Godlessness' than Religion of Christ did in 2000 years?
Most professional Philosophers are now agreeing if your bringing forward the claim "God does not exist", this requires proof by you too. Arguments do demand each party share a burden, why people are not picking up on this, I don't understand why both sides are not understanding each has a responsibility. Your the one making the statement "God does not exist, therefore you do have the burden of proof to make sure your audience is provided proof or best reasons why it's true.
http://www.strangenotions.com/who-has-the-burden-of-proof-when-discussing-god/
One thing to take note of, many atheist debaters are getting away from 'the problem of evil" because that assumes there is evil"
Here's a interesting article, Christians are upset at all the deaths that happened under the name of "No God", it's hard for them to forget too. Dawkins is upset about the deaths by false Christians, we get upset when people kill and follow leaders that teach "God is dead!"
http://www.catholiceducation.org/en/controversy/answering-atheists/answering-atheists-arguments.html