Interesting that people bring up the "Crusades" though, a time in history when everything was completely different than today. People and times were much more violent. None of that excuses the savages that follow Islam.
Actually, back then, the Muslims acted more humanely than the Christians did.
When Christians took Jerusalem in 1099, they slaughtered everyone in the city. Muslim, Jew and Christian alike.
When Saladin took the city back in 1180, he not only didn't slaughter the Christians, he allowed them to leave, only demanding ransoms for the wealthier crusaders still living there.
Also, when you get to talking about 'Savage", we killed more Afghans and Iraqis than they killed of us. Are we not 'Savage" because we use plans and drones to do our killing?