The LDS church holds beliefs that were held by early Christians, but have since been lost to Orthodox Christianity.
The belief that man (like Christ) can become like his Heavenly Father is taught in the Bible and was taught be early Christians.
Bible:
Acts 17:29 (KJV) -* Forasmuch then as we are the *offspring of God…
(Offspring grow up to be like their parents.)
Romans 8:17 (KJV) - And if children, then heirs; heirs of God, and joint-heirs with Christ; if so be that we suffer with him, that we may be also glorified together.
(As joint heirs with Christ we receive from Heavenly Father everything Jesus receives, including Jesus’ nature.)
2 Peter 1:4 (KJV) - *Whereby are given unto us exceeding great and precious promises: that by these ye might be *partakers of the divine nature
Early Christians
Irenaeus noted: “*We have not been made gods from the beginning, but at first merely men, then at length gods.” *
Clement of Alexandria wrote: Knowing God, he will be made like God. . . . And that man becomes God, since God so wills
Cyprian wrote: What Christ is, we Christians shall be, if we imitate Christ.
The idea of spirit children is clearly Biblical.
John 9:1,2 (KJV) - And as Jesus passed by, he saw a man which was blind from his birth. And his disciples asked him, saying, Master, who did sin, this man, or his parents, that he was born blind?
The disciples clearly believed that the man lived before he was born.
Jeremiah 1:5 (KJV) - Before I formed thee in the belly I knew thee; and before thou camest forth out of the womb I sanctified thee, and I ordained thee a prophet unto the nations.
God clearly interacted with Jeremiah prior to Jeremiah being born.
The LDS do not believe that that Jesus was conceived through sexual intercourse between God and Mary. We believe in the virgin birth of Jesus.
I hope this helps…
Just because Catholics and Protestants don’t follow everything in the Bible that I outlined above doesn’t mean they’re not Christians.