Why 9/11?

I recently finished reading Robert Spencer’s Stealth Jihad; I’ve also read Mark Steyn’s America Alone. In reading both of these books, I was struck by the omission of any explanation for the timing of the terrorist attacks of 9/11.

For that, you’d have to read Hillaire Belloc’s The Great Heresies, originally published in 1938, in which you would learn of the defeat of an Islamic army of conquest near Vienna on September 11, 1683.