You keep ignoring the post, and putting up straw dogs.
Christian churches all agree, I think the Christian world must collectively know something about Christianity.
I would say that YOU “are not an acceptable authority”, what arrogance you display.
“You don’t accept the Catholic church, the Baptists, the Methodists, the Greek Orthodox, the Lutherans, and so on when they all agree that Mormonism is not a Christian religion?”
Why should I accept the word of a mere man, be he Joseph Smith, Pope Pius, or Martin Luther himself, about whether or not I am a Christian? Do you look to others to determine whether or not you are a Christian? Or do you pray to God, in the name of Christ, and look for his Holy Spirit to guide you in your daily life?
You are the one with the straw dogs, er, sects. Christ is the ONLY acceptable authority, and He judges each person individually. Do you consider that arrogant? You and the rest of the sanctimonious gatekeepers of Christianity are irrelevant.