Been that way for about 1400 years.
I would bet 90%+ of college students have little idea of how warlike Muslims have been since Muhammad. If you told them that the Turks were outside the gates of Vienna in the late 1600s or the Moors were stopped in France in 732, they'd be shocked.
The history taught to most college students is white, European countries going out and conquering innocent, peaceful, progressive non-European countries.
Not only did the Muslims try to conquer Europe, the Mongols also came close to conquering Europe.
At least when the European countries conquered foreign lands they also brought modern civilization with them and often democratic ideas. The Mongols simply brought death and destruction. Needless to say, a Muslim-dominated Europe would have been a disaster for European civilization.