Wow, that's DC Comics view of history. Time travel and all. The schism happened in 1054. The Fourth Crusade was in 12011204, hundred and fifty years later.
This is as if you claim that Luther's Reformation started because of the Peace of Westphalia. Utter nonsense. At least here on Earth.
The reason for schism in 1054 can not be something that happened in 1201.
However, the murderous looting of Constantinople can be explained the other way around. As well why the loot was never returned.
Has it ever occcured to you that "Orthodox schismatic" is an oxymoron? Schismatic is splinter from the trunk, not the trunk itself. it was Splinter that added Filioque to the Nicene creed, and the trunk opposed it.
I asume that is the reason why you call Orthodox Church "so called "Orthodox".
well said DTA!
Little researcj before posting might go a long way. Theolopgical differences between the Catholic and Orthodox Churches were established long before the sacking of Constantinople by the crusaders.