Ottoman empire aside, in more recent history, the Muslimes eagerly assisted the Nazis in the killing of over one million Serbs in WW II.
The Ottman's invaded I believe in 1300/1400AD. If the Serbs would have just booted them, instead of ethnic cleansing, there wouldn't have been a fuss. What the Muslims are committing now in Kosovo, is the very reason Clinton, and Madeline Halfbright went ballistic. NATO, or no NATO, the Serbs have very long memories. Plain and simple, Kosovo will never be a U.S. Allie, but for sure, will be a springboard for Islamofascist terrorism.