As I said, the Catholic churches are in disagreement with each other just as much or moreso than the Protestant churches are with each other. This seems to come as "news" to you, but there are no two Catholic churches that are in NOT in disagreement--and substantial disagreement--with the others, yet the differences between Protestant bodies is often something much less significant. The Roman and the Eastern Orthodox churches don't agree on the procession of the Holy Spirit and it caused the biggest schism in Christian history, one that is still ongoing a thousand years later. And the Roman and Eastern churches disagree on Papal Supremacy and have done so since the start of the RCC. The Oriental Orthodox disagree with the Eastern Orthodox on the nature of God, and the Old Catholic Union of Utrecht disagrees with the Papal Church on the priesthood and Papal Infallibility to name just a couple of areas of dispute. Nevertheless, each of them likes to talk as though it is the only true church and has never changed any of its doctrines. LOL