Joseph Smith said:
" I will preach on the plurality of Gods. I have selected this text for that express purpose. I wish to declare I have always and in all congregations when I have preached on the subject of the Deity, it has been the plurality of Gods. It has been preached by the Elders for fifteen years.
I have always declared God to be a distinct personage, Jesus Christ a separate and distinct personage from God the Father, and that the Holy Ghost was a distinct personage and a Spirit: and these three constitute three distinct personages and three Gods. If this is in accordance with the New Testament, lo and behold!
we have three Gods anyhow, and they are plural: and who can contradict it!"
"......the doctrine of a plurality of Gods is as prominent in the Bible as any other doctrine. It is all over the face of the Bible...."
Joseph Smith's Sermon on Plurality of Gods
(as printed in History of the Church, Vol. 6, p. 473-479)
SERMON BY THE PROPHET—THE CHRISTIAN GODHEAD—PLURALITY OF GODS.
Meeting in the Grove, east of the Temple, June 16, 1844.
http://www.utlm.org/onlineresources/sermons_talks_interviews/smithpluralityofgodssermon.htm
"There are three separate persons in the Godhead: God, the Eternal Father; his Son, Jesus Christ; and the Holy Ghost. We believe in each of them (A of F 1:1). From latter-day revelation we learn that the Father and the Son have tangible bodies of flesh and bone and that the Holy Ghost is a personage of spirit, without flesh and bone (D&C 130:22–23). These three persons are one in perfect unity and harmony of purpose and doctrine (John 17:21–23; 2 Ne. 31:21; 3 Ne. 11:27, 36)."
Ref:https://www.lds.org/scriptures/gs/god-godhead?lang=eng&letter=g
"Latter-day Saints believe in God the Father; his Son, Jesus Christ; and the Holy Ghost (A of F 1). These three Gods form the Godhead, which holds the keys of power over the universe. Each member of the Godhead is an independent personage, separate and distinct from the other two, the three being in perfect unity and harmony with each other (AF, chap. 2)."
Ref:http://eom.byu.edu/index.php/Godhead
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From other camp:
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Since the Trinity is one of those subjects that Mormons laugh at and mock, I take them to 2 Nephi 31:21 which reads:
“….And now, behold, this is the doctrine of Christ, and the only and true doctrine of the Father, and of the Son, and of the Holy Ghost, which is one God, without end. Amen.”
Then I ask them why they don’t believe in the Trinity since it is taught in the Book of Mormon, which Joseph Smith said is the most correct book on the face of the earth."
http://www.4witness.org/how-to-use-the-book-of-mormon-to-prove-the-trinity/
=== So one easily concludes that according to Mormons, Jesus is part of God, whatever words maybe used.
Here's my two cents worth, and believe it or not, I do know a thing or two about the Mormon understanding of the nature of God. The word "God" can be used to refer to any one of three personages who collectively make up the Godhead (the Father, the Son and the Holy Ghost). In this respect, it's a title that all three individuals share. The word "God" can also be used as a collective noun (much like the word "team"). When it is used in this way, it is as a synonym for "Godhead." When the scriptures say there is just "one God," it means there is one "Godhead."
The Bible does, in fact, say that the Father and the Son are "one." But it does not say they are "one substance" or "one essence." The word "one" does not need to be referring to the numeral '1'. It can also mean "united," as in the following examples:
Exodus 24:3 says, "And Moses came and told the people all the words of the LORD, and all the judgments: and all the people answered with one voice, and said, All the words which the LORD hath said will we do."
2 Corinthians 13:11 says, "Finally, brethren, farewell. Be perfect, be of good comfort, be of one mind, live in peace; and the God of love and peace shall be with you."
Acts 4:32 states, "And the multitude of them that believed were of one heart and of one soul: neither said any of them that ought of the things which he possessed was his own; but they had all things common."
In each of these examples, the word "one" is used to describe a unity that has nothing to do with the numeral "1". Trinitarians continue to say that the Father and the Son are "one in substance," but when pressed for passages that confirm their belief, they are unable to. It is entirely possible and reasonable to believe that the Father, Son and Holy Ghost are three separate persons who are "one" in every respect except the physical.
I believe if you were to have asked Jesus' Apostles about the Trinity, they would have looked at you in complete bewilderment as the concept would have been completely foreign to them.
