Not sure how that relates to the mass murder of jews and orthodox christians by the crusaders. They were criminals mate, pure and simple.
Mass murder of Orthodox Christians? Unless you're referring to the sack of Constantinople by defectors in the last Crusade, your claim has no historical support.
The native Orthodox Christians and the Catholic Crusaders fought side by side against the Muslim invaders. That's why the Crusader burial sites discovered in Sidon contained the remains of both Europeans, local Christians and their mixed offspring. This discovery puts an end to the narrative that Crusaders were just evil Europeans fighting poor innocent Middle Easterners, since it's clear now local Christians also took part in the battles against Muslims.