Demons sound like prophets/I'm living out every word they say.
The day before in my sermon on Hebrews 1, I put our people on notice that in the finality of Christ's revelation, all previous true prophets were fulfilled and outranked by Christ. All previous and subsequent false prophets were vanquished and deemed irrelevant and irreverent by his appearance as Word of the Father, Perfect Prophet. I even named Mohammed and Joseph Smith as belonging to this category.
Ironically, as CS Lewis has pointed out, Islam is a Christian heresy. To that I would add LDS who even dares to call Jesus "Saviour of the World" and "Son of God." Heretics parse their words differently though they use the same vocabulary. Now is the time for the Creeds: Christ, very God of very God, Light of Light, is of homoousias of the Father. His deity is eternal, permanent, and he eternally proceeds from the Father. Mohammed and Joe Smith's authority comes from the Father of Lies.
Demons sound like prophets. Their spokesmen are walking up to your porch and dancing burning your flag and slandering your Saviour. Don't say I didn't warn ya! I'm just passing on what's been given to all the saints (Jude).