Although they are technically considered as "Christians" for following the beliefs and teachings of Christ, they are indeed not true Christians, for they have very radical beliefs and teachings compared to those of Christianity. They claim to believe in the Bible but say it can only be trusted if it is "translated" or "interpreted" correctly (very high emphasis added) which therefore indicates that they don't truly believe in it. They believe the Book of Mormon holds more authority than the Bible, although the Bible says that it's the FINAL word of God and is not to be taken away from or added to. Also many of their practices are not even found in the Book of Mormon, most of them are from other doctrines and "revelations" that their mormon prophets claimed to have.
Mormonism teaches that God has not always been God, but through obeying laws and ordinances of the Gospel he was able to progress to deity. Therefore, the god of Mormonism is a changing being. He was once a man, who then became a god. His knowledge, wisdom and power have therefore increased. Mormons believe that all faithful Mormons will progress to become deities (or God's) of their own universes and produce spirit children with their spouse in order to populate their world.
The bible reveals a very distinctive God. The true God does not change (Malachi 3:6) nor does he grow in knowledge (Isaiah 40:13). God is spirit, not an exalted man with flesh and bone (John 4:24; Luke 24:39; Hosea 11:9; Numbers 23:19).
Despite the teachings of Mormonism, men cannot become god's (Isaiah 43:10). Man was created, unlike God, and therefore has not existed from eternity (1 Corinthians 15:46). Mormons cannot compare themselves to Jesus and his preexistence, for they are not deity by nature, as is Jesus who preexisted because he IS God.
*Who should trust in god's who change?
Why trust in a mere man who has become a god? Are you not still trusting in a man?
Mormons believe that there is archaeological evidence supporting the Book of Mormon, when there is in fact NONE whatsoever. No cities unique to the BoM have ever been located, and also the BoM contains no maps which indicate the alleged cities had ever been located.
*If the BoM is a record of REAL history (like the Bible), why hasn't the mormon church published any maps?
This question will often be side-stepped by Mormons. In Moroni (10:4-5) we are instructed to pray about the BoM to find out if its true. Generally the answer expected by Mormon's is a "burning in the bosom" which is a heart-felt emotional experience.
Although we are expected to pray, nowhere does the Bible teach that prayer is a test for truth. We cannot trust the feelings of our hearts (Proverbs 14:12; 28:26; Jeremiah 17:9) nor can we trust every spiritual witness (1 John 4:1-6).
*The witness of the Holy Ghost will NEVER contradict the word he inspired the Bible (2 Peter 1:21). The mormon prophet Joseph Smith and many other mormon prophets have contradicted the Bible numerous times, not too mention they have also contradicted their own BoM!
*In Deuteronomy 18:20-21 we are told that a prophet of God will never have false prophecies and will never teach false god's. It is already apparent that Joseph Smith has taught of false god's, and has also proclaimed several false prophecies. In Doctrine and Covenants sec. 84 Joseph Smith prophesied that the city of New Jerusalem would be erected within HIS generation "in the Western boundaries of the State of Missouri." To this day, the Mormon Church has failed to erect it. This is clearly a false prophecy, therefore, making Joseph Smith a false prophet.
Mormons often refer to 1 Corinthians 15:40-41 as proof that there are different levels of heaven: "There are also celestial bodies, and bodies terrestrial: but the glory of the moon, and another glory of the stars: for one star differeth from another star in glory." But these verses teaching nothing of the Mormon concept of the three degrees of glory. As a matter of fact, the word "telestial" does not occur anywhere in the Bible.
Although most Mormon's are very nice and have good values, they are very misled. Not to mention they are overly concerned with converting (more members= more tithing = more money for the Mormon Church).
The Mormon Church is indeed a false church, and Joseph Smith is indeed a false prophet.
Joseph Smith: I don't understand parts of the Bible (because I only have a third grade education), so I will change those parts to what I THINK and WANT them to mean! If I ever change my mind or am proved to be a liar, I can just have a revelation which will allow me to change it! My followers and I will call it "Mormonism" or "mormon" for short. Together we will deceive the world and lead millions away from the truth!