Did you know that HALF of the New Testament wasn't written when Revelation was? Also, everything that was written after Deuteronomy 4:2 would not have been written if Deuteronomy 4:2 was the defining end. The definition of Christian is anyone who follows the teachings of Christ and applies them within their lives. Mormons are that. Don't tell me what I believe, ASK what I believe. The fact that most Christians call out Mormons as a cult only furtherproves John 15:18 on us. And I've got a few videos for you on Mormonism.
https://www.youtube.com/watch?v=Tf7ajVr0jFo&t=146s (Applying Deuteronomy 18 to biblical prophets on the same level as Joseph Smith)
https://www.youtube.com/watch?v=QjBpwtXG7CM (Evidence of the BOM)
https://www.youtube.com/watch?v=wHZLBr_WcmM (Mormon fixes the confusion of the Trinity shown by a Muslim)
Also, a lot of things that Mormons are said to believe, either are FALSE or aren't held by the church any longer, like polygamy