The Times has an op-ed by David V. Mason, "I’m a Mormon, Not a Christian," that proffers:
I want to be on record about this. I’m about as genuine a Mormon as you’ll find — a templegoer with a Utah pedigree and an administrative position in a congregation of the Church of Jesus Christ of Latter-day Saints. I am also emphatically not a Christian.There is more. Read the article.
For the curious, the dispute can be reduced to Jesus. Mormons assert that because they believe Jesus is divine, they are Christians by default. Christians respond that because Mormons don’t believe — in accordance with the Nicene Creed promulgated in the fourth century — that Jesus is also the Father and the Holy Spirit, the Jesus that Mormons have in mind is someone else altogether. The Mormon reaction is incredulity. The Christian retort is exasperation. Rinse and repeat.
I am confident that I am not the only person — Mormon or Christian — who has had enough of the acrimonious niggling from both sides over the nature of the trinity, the authority of the creeds, the significance of grace and works, the union of Christ’s divinity and humanity, and the real color of God’s underwear. I’m perfectly happy not being a Christian. My Mormon fellows, most of whom will argue earnestly for their Christian legitimacy, will scream bloody murder that I don’t represent them. I don’t. They don’t represent me, either.