Are you frigging nuts? Did Jesus give Peter his own copy of the word of the Lord? Peter LEARNED of the word of the Lord BY LISTENING to what Jesus taught him. And Peter also prior to jesus used the law of Moses. As you ask why do Mormons use the BOM Jews will ask why do Christians use the NT?Why do you use the BOM? Peter used the word of God
Pologamy contradicts Gods word
The concept of paradise & heaven the BOM use are not found in the Bible
The structure of leadership in the BOM is not what the Bible says
I could go on
And God authored polygamy on many occasions with several of his prophets/leaders. Never in a single instance will you read in the OT or the NT that marriage is a strict command from God to be of one man and one woman. It does mention marriage to be between a man and a woman and between a man and more than one woman. And it mentions God made laws for both types of marriages. Read the Bible.
The concept of paradise and heaven are in the Bible.
Christians deny the structure of the leadership Jesus established in his church.
Christians deny the existence/need for apostles and prophets Jesus set forth.
Christians deny the need for revelation to know the will of God.
Christians today tell people how they think God thinks and what he feels.
Christians today decide which commands to obey and which to not obey and you spend time criticizing Mormons?