"The Crusades were prior to the Muslim forays into Europe."
From whence comes your information? Osama Bin Laden?
Check out: www.crisismagazine.com/april 202/cover.htm
Without reading your link, I was wrong about the Moors of Spain (Berbers bascially). I didn't realize they conquered most of Spain so early. But the Balkans came after the Crusades.