A lot of the people here at FR are very knowledgeable about the Mormon religion.
I’m sure that there are many on FR who are familiar with the beliefs of The Church of Jesus Christ of Latter-day Saints. But there is no such religious organization founded by the name Mormon. The appellation “Mormon” was meant as a pejorative by those who sought to defame the church since it’s founding. Latter-day Saints, being an affable people, for a long time accepted the term and turned the other cheek. There is no such thing as the “Mormon” Church. Some might get by with the slander that Mormons are not Christian, but saying the people of The Church of Jesus Christ are not Christians is much too funny. So that is a huge tell.