It is a well-worn tactic of the critics of the Church to try to use our own Book of Mormon against us, to suggest that its claims about the nature of God are different from what the Church now teaches.
They state that the Book teaches the Trinity, the uncreated status of God and His eternal, unchanging nature, things, they say, that Mormonism came to deny, along with ancient heresies such as Sabelianism, that Christ is the Father.
But this alleged discrepancy never seems to have troubled the Prophet Joseph Smith or the vast majority of Church members, then or now. Was he and are we all just blind and stupid?
The truth is, we DO teach the Trinity. The Father is God. Jesus Christ is God. The Holy Spirit is God. They are one.
We DO teach the uncreated status and eternal nature of God. More detail on that later.
We just differ in certain ways in HOW we believe these things, what they mean, where the line is drawn.
Let's take one example: In a sense, Christ certainly is our Father, as the Book of Mormon teaches. We are reborn spiritually because of His atonement and we take upon us His name. That does not mean that we confuse him with the person of our Heavenly Father, who created our spirits in the first place. The latter is Sabellianism.
Now, was that so difficult to understand?