The number one reason is BECAUSE IT HAS CHANGED GOD FROM WHAT HE IS REVEALED TO BE AND MADE INTO THE LIKENESS OF A MAN. The second reason is because they deny the singularity of God an opting for a teaching that billion of billions of Gods exist in the cosmos and that three exist for this world.. That is a denial of the Bible that teaching that God must have be lying when he said "Is there a God beside me? yea, there is no God; I know not any.". Time and again the LDS deny that the Words of God are truth. Jesus said that His words would never p*** away and yet if they are corrupted then the word we have is worthless.. Remember Jesus is the Word, and the Word is God (John 1:1).. But that is only if the Bible is God's truth.. The requires faith in Jesus and that faith is the only hope we have to access the grace of God unto salvation.. IHS jim