The Fourth Crusade and the Sack of Constantinople
I guess since this was "Christian vs Christian" and not "Islam vs Christian" it wasn't pertinent to the theme - "The Jihad That Led to the Crusades."
Regardless, the Sack of Constantinople wasn't very Christian was it?
"To the crusaders, God had approved their actions by granting them victory and many returned home proudly bearing precious relics. At first, Pope Innocent III was delighted but, as news of the atrocities became clear, he changed his view and began to express anger and disgust at the westerners actions. He accused one senior noble of turning away from the purity of your vow when you took up arms not against Saracens but Christians
preferring earthly wealth to celestial treasures. "
Could that be because the story ends in 1095, with the call for Crusade?