Would you then consider Mormons to be Christians?
"Jesus is the Son of God and our loving Savior. He lived to teach us, and He suffered and died to save us from sin and death. Because of Him, we can be forgiven, we can overcome challenges, and we can live with God again someday." - Church of Jesus Christ of Latter Day Saints, What We Believe
What about Jim Jones?
"I believe that Jesus Christ is the son of God, and God is the Creator of the universe." - Jim Jones
"Well, I’m a disciple in my teachings, disciples, uh, Disciples of Christ teach that Jesus Christ is the son of the savior of the world. (Pause) And God is, is Love." - Jim Jones
You judge by what they say and do.
If Mormons still believe they will become the God of there own world then they are not Christian.
Jim Jones murdered his followers that is not the act of a Christian.