Excommunicated Humbert from the Eastern Church (Leo IX was already dead)2.
Began as a “commercial” venture to repay dept to Venetians by killing Muslims 3.
They were called the “Anabaptists” which means “re-baptizers” by their detractors.
Broke from the Catholic Church as a result of a sausage eating event that was scheduled during a “holy fast” decreed by the Catholic Church.
Were it not for a letter to Mohammed to "spare the Copts as they are your 'kin;" The Coptic Christians would have possibly been driven out or worse, wiped out.
But they survived and still exist today and are constantly in the news for all of the atrocities that the Muslim Brotherhood inflict upon them.
Perhaps the most amazing, strong, and devout followers of Christ on the earth.
Just as the Waldensians are the most persecuted of all protestant denominations, the Coptic Christians of Egypt are the most persecuted of ALL Christian denominations, period.