Mormons do not believe that the Bible is the infallible repository for redemptive revelation. In their view it’s the Book of Mormon that is the most correct of any book on earth. Not only so, but in Christianity Jesus is the self-existent Creator of all things while in Mormonism he is the spirit-brother of Lucifer who was conceived in heaven by a celestial mother and came in flesh as a result of the Father having sex with the virgin Mary.
The Bible vs. The Book of Mormon