"These avenging angel crusaders.. would they be the same as those who sacked (Christian) Byzantium?"
Nope, they wouldn't be.... see #39. I'm not saying the crusaders were all angels by any means, but the amount of dishonest propaganda that has been spread about them is truly staggering. The crusaders certainly do not compare badly to many other military ventures of their era, and they certainly aren't ALL-BAD compared to the Islamic armies that slaughtered so many innocents, then and since.
When you get a film like the current Ridley Scott dishonest garbage it can only be properly understood in the present political context as a propaganda blow on behalf of Al Qaeda and other Islamo-fascists.... part of the deranged outlook of the civilization-hating elites.......