In his piece Why Does Turkey Hate America? (an interesting subject in itself,) "Spengler" puts the central issue of Christianity (and Islam, for that matter) as succinctly as one could want:
I have never believed that such a thing as "moderate Islam" exists, any more than I believe that "moderate Christianity" exists. Either Jesus Christ died to take away the sins of the world, or he did not; if one believes that Jesus was just another preacher with a knack for parables, one quickly will be an ex-Christian. Either God dictated a final revelation to Mohammed which invalidates the corrupted scriptures of Jews and Christians, and the sign of the crescent should rise above the whole world, or he did not.
Oh, that so many in the Episcopal Church (and other liberal churches) could be so clear…too bad the Qur’an isn’t on the subject of the corruption of the previous scriptures!