[metmom]

Yes, the Orthodox say that they were the oriiginal Catholics and that the Roman rite is thenes who went off.

[Syncro]

Similar to the Mormons who "protested" against those that chose to follow closely what Joseph Smith et al taught, ie polygamy (btw any Mormon who doesn't agree that they should be able to have multiple wives is disciplined), becoming a "god," Jesus is the brother of Satan etc

The Mormon church, LDS, today is the Mormon version of "protestant."

Same here with the Catholics and their protestations against the Orthodox, who would not follow their pope or believe in Jesus being in a piece of bread to be worshiped (veneration rooms) and other extra Biblical beliefs of Roman Catholics.

Quite a bit later came the Protestant "movement" when eventually Christians Born Again Believers broke with Catholicism also so they could follow Jesus with the leading of the Holy Spirit instead of men's traditions--see Church Fathers, highly respected, quoted continuously and followed by those who follow the denomination/belief system of Catholicism.