Somewhere along the way, someone decided they didn't like the idea of Peter and his successors as heads of the Church on earth, so they interpreted the scripture differently, and from there, other Christian communities emerged. Some were more closely tied to the Catholic Church, which was then called ROMAN Catholic, because Rome is where Peter ended up, and from there his successors administrated the Church.
Others, later on, rejected the Catholic Church totally, and began to denigrate her, to the point they even want to deny that she was founded from that early Church instituted by Jesus. Thus we are in the situation we have in the world today.
Funny how its still your interpretation.
Well, we might like them if you guys had a clue as to who they were. The first one I see pops up about 379 AD with Pope Damasus.