Wouldn't have been so bad if the Christian Crusaders didn't slay the innocent people whom were simply working on the streets.
The Crusaders stole whatever they wanted, killed whoever they wanted, and pretty much did whatever they wanted.
Their goal was to become rich and powerful, like 'a true Knight should be'.
This wasn't actually a bad thing, as the Muslim's survived, the Crusades failed, and the Crusaders who managed not to get themselves killed, brought back valuabe information and new technology based on Economy survival, new ideas about Agriculture, etc.
All in all, the Crusades benefitted most people.
-New knowledge for the Christian cities.
-Less people to take care of for Muslim Cities.
I support the Crusades. The world wouldn't be the same if they never took place. Literally.