"Some people think that Mormans are not Christian."
As far as I can tell, they aren't. Not a slam; just an observation that Mormonism has a very different theology from the rest of Christianity. The Catholic Church and the most radically anti-Catholic Protestants have far more in common than either has with Mormonism.
I was born and raised Catholic. A lot of what my father taught me was from his own Bible reading. I was one of those who thought that the Mormons were some cult. Then I looked into it and found that I already believed a lot of what the church thought.