If it contradicts Scripture, it's false.
Teaching that God was a man, that He impregnated Mary, and that men become gods after death is clearly contradictory. No Christian denomination even comes close to teaching such things.
Why does it bug you to see this pointed out?
So if a religion fails to treat women equally with men as being one in Christ Jesus, then that religion becomes a false one? Or if a religion discourages people from prophesying or praying in tongues, that religion becomes a false one? Or does your standard only apply to Mormons?