All of the instances you mentioned to be Islamofascist are religiously based. Coyne said 'religious', not 'Christian'.
In any case the use of perpetrated evils in no way affects the validity of science and should not be used by either side.
He did. However, not all religions are the same. He said that Ann was wrong that the greatest number of deaths throughout history could be laid at the feet of atheistic communists. He said the greatest bloodshed was due to religion. He's right only if he considers the atheists' struggle against other religions in his calculus and proves Ann's point in the process.
If you read his "work" again you will see that he attempts to equate all religions, including Christianity, in his blood liable. I was simply showing that if he wants to talk religious bloodshed, not all religions are equal.