Yet they almost completely ignore Islam. William Kilpatrick has been doing a ton of writing on the subject of Islam for a long time. From his latest:
As I say, these assertions about the authenticity of the revelation appear over and over. Far more space is allotted to vouching for the genuine nature of the revelation than to telling what the revelation is. But what sort of author feels compelled to tell us ad nauseum that his word is not a human invention? It’s not likely that the Author of all Creation would be so insecure about what he had written. On the other hand, a man who had invented it all himself would have good reason to be defensive. Muhammad, however, also realized that the best defense is a good offense. Thus, as the Koran repeatedly reminds its readers, the surest path to hell is to doubt “Our revelations.”
In insisting that the Koran is the verbatim word of God, Muslims are stuck with the task of defending a second-rate literary production as though it were Shakespeare, Homer, and Dante all rolled into one. If they have been largely successful in so defending it, it is because not many want to challenge them on the point.