Quite right ... if people were telling Logophile he is not a Christian. Mormonism is an heretical look-alike to Christianity. There are some Christians in that cult, but I wouldn’t begin to guess how many of its adherents are Christians, the religion of Mormonism isn’t, though.
What year did Mormons start referring themselves as being Christians? This is a recent event in the Mormon doctrine. They were taught from the beginning that they were "Mormons" not Christians.
It has been just recently that the Mormons have started this new Campaign to have the world refer them as "Christians".
And if you do not call them Christians you are a bigot.