From a YouTube comment on a Christmas Video I posted there:
I think that the confusion lies in the view of the Trinity, drug taught from the very beginning of the Church. There is One God, co-eternal with the Son and Spirit. God was never like man nor will man ever become like God. Hear O Israel, the LORD is One. No other diety. Lucifer was not the brother of Jesus.
Because of the limit on post-length at YouTube I am responding here.
You are correct that those are some of the doctrines that cause some Christians to label the Church of Jesus Christ of Latter-day Saints (LDS Church) as a non-Christian religion. Most members of the LDS Church have a different and more inclusive definition of Christian. The LDS definition of Christian simply means anyone who believes in Jesus Christ and who worships Him. This definition probably has its roots in the Book of Mormon passage from Alma 46:13-15.
13 And he fastened on his head-plate, and his breastplate, and his shields, and girded on his armor about his loins; and he took the pole, which had on the end thereof his rent coat, (and he called it the title of liberty) and he bowed himself to the earth, and he prayed mightily unto his God for the blessings of liberty to rest upon his brethren, so long as there should a band of Christians remain to possess the land—
14 For thus were all the true believers of Christ, who belonged to the church of God, called by those who did not belong to the church.
15 And those who did belong to the church were faithful; yea, all those who were true believers in Christ took upon them, gladly, the name of Christ, or Christians as they were called, because of their belief in Christ who should come.
This is why most any Mormon you meet will be incensed when someone even insinuates that Mormons are not Christians. I am a Mormon and I think I understand both sides of this issue. When a Mormon calls himself or herself a Christian, they mean that they are a follower of Jesus Christ. Whether most Evangelical Christians believe that or not is another question entirely.
I do not believe the same creeds that Evangelical Christians believe, but I call myself a Christian because I believe that Jesus Christ is my personal Lord and Savior and I strive to follow, praise, and honor him. I hope that this video helps me do those things, if only in some very small and insignificant way.