The truth or falsity of a statement about being a Christian is governed by what Christ taught and what the Word of God says. It isn’t what church you belong to or what theological perspective you have on non-essential doctrines. The truth is the Gospel itself.
It was declared by Paul in 1 Corinthians 15:1-4,
‘I declare unto you the gospel, which I preached unto you, which also ye have received, and wherein ye stand; by which also ye are saved, if ye keep in memory what I preached unto you, unless ye have believed in vain. For I delivered unto you first of all that which I also received, how that Christ died for our sins according to the scriptures; and that He was buried, and that He rose again the third day according to the scriptures.’
We are warned in Galatians 1:9 not to preach anything else as the Gospel of Christ,
‘If any man preach any other gospel unto you than that ye have received, let him be accursed’. Nothing can be added, nothing taken away from the Gospel of Good News.
Mormonism cannot be Christianity – not because we say so or because we take a vote on that subject in the Christian church.
It cannot be Christianity because it denies the doctrine of God and says there are many gods.
It denies the doctrine of Christ and says that He is a god, a spirit brother of all mankind, when the Bible says that He is God in human flesh.
It cannot be Christian because it teaches that the birth of Christ is result of sexual relations between a resurrected god and Virgin Mary to produce Jesus of Nazareth.
Further more it cannot be Christian because it denies salvation by grace alone and adds human works, which Paul says destroys the gospel. It cannot be the gospel of Christ because it is ‘another gospel’, it has ‘another spirit’ and teaches of ‘another Jesus’. (2 Cor. 11:3-4, 13-15.)
We love Mormons and are willing to stand for truth so that they might come to the knowledge of truth that saves. We would be remiss in our function as Christians if we did not tell the whole counsel of God that says what Christianity is.
Mormonism is not it – it is polytheistic, it is eternally polygamist – and thus thoroughly non-Christian.