Christian meant originally a disciple of Jesus. And person is a disciple of Jesus, if he remains in the word of Jesus. Why call them Christians, if they don't remain in the word of Jesus?Have you ever heard of Pope Urban II?
He was the leader of the Christian church who called for the Holy Crusades in 1095.
The leadership of the Christian church didn't end with Jesus. I'm not even sure it began with Jesus once Paul came on the scene.
What Jesus was reported to have said 2000 years ago doesn't seem historically relevant to the leadership/actions of the Christian religion.
…The disciples were first called Christians in Antioch.
Acts 11:26
Jesus therefore said to those Jews who had believed him, “If you remain in my word, then you are truly my disciples. You will know the truth, and the truth will make you free.”
John 8:31-32
I don't think they could be called even Paulian, because they seem to go with their own doctrines.