I speak as a Christian fundamentalist - that is, a person who believes the Bible is the inerrant Word of God.
Indeed, there were many atrocities committed in the name of Christ. In my opinion, these were caused by people not knowing or believing the teachings of Christ - people who could falsely rationalize that others were subhuman - animals - either by race, customs, or the deeds of their ancestors.
Paradoxically, that kind of thinking exists today among the very ignorant as well as the very educated. On the one hand, the CI/Aryan types and on the other, the anti-Semitic intellectual agnostics. I do not take it lightly that the hate always seem to center first on the Jewish people.
IMHO, the more people are discouraged from embracing the teachings of Christ, the more likely these atrocities will happen again.
I urge you to examine the numbers on these exhaustive tables Democide - along with the sources. It puts the entire issue in much better perspective to all such atrocities and will substantiate that the greatest horror was brought by atheistic political regimes.