Good link, h/t Sophia

St John of Damascus and Islam

Interesting, and of interest because St. John of Damascus is my patron. Oddly enough, we have a fairly similiar view of Islam, though I can't quite classify it as a Christian heresy. On the other hand, I've seen Bolshevism classified as a Christian heresy so there really is no accounting for taste. The links in this article are to some really good stuff.