“He was the brother of Satan”
Only in the sense that the Father begot the spirits of all, including Christ and Lucifer (son of the morning).
“God had sexual relations with Mary to conceive Christ.”
That is a lie, we believe in the virgin birth and always have. The BoM testifies of it as well, that Marry conceived by miracle and gave birth as a virgin.
As clearly explained here with annotations, Mormonism teaches that Jesus, Lucifer and all mortals on this earth were originally born as spirit children to God the Father and his wife in a pre-mortal life. Angels, devils, mortals and gods are regarded as the same species but in different stages of advancement or judgment. The two oldest sons were Jesus and Lucifer. Lucifer convinced one-third of his brothers and sisters to join him in rebellion and were expelled from Heaven.Christians consider this blasphemous.
The Mormon Church teaches: “God had sexual relations with Mary to conceive Christ.” ... that is a lie, we believe in the virgin birth and always have. The BoM testifies of it as well, that Marry conceived by miracle and gave birth as a virgin.
As clearly explained with annotations here (beginning at the bottom of p. 179), and here (beginning in the section titled LITERAL SON OF GOD), Mormon theology teaches that God is a man and that Christ was conceived through a sexual act between Mary and God the Father. In other words, the birth of Christ is considered a natural, rather than a miraculous occurrence.Putting the two doctrines together: according to Mormon theology, since Mary was the spirit daughter of God the Father, and since God the Father had physical sexual relations with Mary, God the Father essentially committed incest when He begat Jesus. Christians also consider this blasphemous.Joseph Fielding Smith, Jr., said: "The birth of the Savior was a natural occurrence unattended with any degree of mysticism, and the Father God was the literal parent of Jesus in the flesh as well as in the spirit" (Religious Truths Defined, p.44). The late President Joseph Fielding Smith declared: "Christ was begotten of God. He was not born without the aid of Man, and that Man was God!" (Doctrines of Salvation, vol. 1, p.18).
Christians also consider this blasphemous.
You wrote: The BoM testifies ...
As you can see HERE, there are many important LDS doctrines which are not found in the Book of Mormon.In fairness to you: It has been my experience in talking with Mormons over the years that many LDS members are not aware of all their church's teachings. This is due in part to the practices of progressive revelation as one "matures spiritually" and/or "progresses" in Mormonism.Moreover, as explained with annotations HERE, there are many key doctrines found in Doctrine and Covenants and The Pearl of Great Price which clearly contradict Book of Mormon scripture.
It has also been my experience Mormons are often troubled when they discover some of the their church's doctrine.
Both Mormonism and Christianity teach the eternal future of your immortal soul depends on the decisions you make during your lifetime. It is therefore essential for us to "get things right." With this in mind, I encourage you to study and above websites and let me know if you find any of their statements in error.
I wish you the best in your quest for the truth.
Are you sure about that?
"The birth of the Saviour was as natural as are the births of our children; it was the result of natural action. He partook of flesh and blood—was begotten of his Father, as we were of our fathers." (Journal of Discourses, v. 8, p. 115).
AND
"The birth of the Savior was a natural occurrence unattended with any degree of mysticism, and the Father God was the literal parent of Jesus in the flesh as well as in the spirit." (Religious Truths Defined, p. 44) as cited in the book, Mormonism: Shadow or Reality, by Gerald and Sandra Tanner, Utah Lighthouse Ministry, P.O. Box 1854, Salt Lake City, Utah 84110, Bookstore at 1350 South West Temple. 1982, page 260).AND
"Christ was begotten by an Immortal Father in the same way that mortal men are begotten by mortal fathers," (Mormon Doctrine, 1966, page 547.)AND
"In relation to the way in which I look upon the works of God and his creatures, I will say that I was naturally begotten; so was my father, and also my saviour Jesus Christ. According to the Scriptures, he is the first begotten of his father in the flesh, and there was nothing unnatural about it." (Journal of Discourses, v. 8, p. 211)
So who is lying? Me? You? The Mormon church? Someone out there is teaching that God had sex with Mary.