If that was gamecock’s point, it is not a good one. Even if I thought Mormonism was Christian, which I don’t, it would make no sense to refer to Mormons (when one wants to refer to them SPECIFICALLY) as simply “Christians”. In the same way, if one wants to refer SPECIFICALLY to squirrels, one does not say “mammals”.
There is a denomination called “the Church of Christ”. It is a proper name. If I referred to that Church I would refer to it as “the Church of Christ”, even though I do not grant, as a matter theology, that that denomination is THE Church of Christ. I call Orthodox Christians “Orthodox”, because that is the term that they use, even though I do not grant, as a matter of theology, that they are in fact orthodox. They are 99.9% orthodox. One cannot please everybody; but, normally, one tries to apply to people and institutions the proper names they give themselves, and one avoids terms that are generally regarded as hostile, unless, of course, one is attempting to express hostility.
And that's why it's wonderful that we live in this free country where you are free to refer to Mormons as Christians because they've asked you to call them Christian.
And in this free country I will refrain from calling any Trinity-denier a Christian.
As has been noted, words count.