Are Mormons Christian? The answer to that questions is in most cases, yes, they are.
But is Mormonism Christian? That is an entirely different matter.
When is a secret agent a secret agent?
This might not seem connected, but it is.
Not many years ago a case came to court that seemed like the worst kind of fictional plot for a pot-boiler of a novel.
A man approached a group of college friends and he wheedled his way into their confidences.
Eventually he was able to produce evidence that he was an officer in MI6 and that he was spying on a fellow student who was Irish and, he told them, a member of the Provisional IRA and in charge of a local IRA cell. He pointed out to some perceived inconsistencies in the Irish student's behaviour and he was able to convince them that what he told them was the truth.
The man even became the lover of one of the group and, I seem to recall, fathered a child by her.
He recruited them into MI6 as agents and had them undertake missions.
Eventually he told them that they had somehow had their covers blown and he made them flee for their lives.
They spent several years fleeing from place to place, taking up whatever lowly paid job they could, always fearful for their lives. He made them get money from their families whenever they could.
This carried on until, one day, the police arrested the MI6 agent. Who, of course, turned out not to have been an MI6 agent at all.
So although the people who he recruited had been convinced that they were MI6 agents, who even had documents prepared by the alleged MI6 agent to prove that they were MI6 agents, they were, in reality, not MI6 agents at all. They were, instead, victims of a wicked, calculated fraud by a man who was an amoral fantasist.
There is a very strong parallel with Mormonism, here.
Mormons have written, documentary evidence that they are Christians. They are members of record of the Church of Jesus Christ of Latter-day Saints. Their Elders have their written Lines of Authority.
But they are like the poor souls who were deluded into thinking that they were MI6 agents. All of the documentary evidence that shows they are members of the Christian Church are false papers based on a long-term fraud invented and perpetrated by a group of men, including Joseph Smith and Brigham Young.