“all Christian denominations agree that mormonism is a different religion from Christianity, one created by Mr. Smith.”
Are you a parrot? I told you Jesus Christ is my Savior and I am a Mormon. I believe in the Father, the Son, and the Holy Ghost. Sorry that’s not good enough for you. Luckily, you are not my judge; that job is reserved for Jesus Christ, my Advocate and Best Friend.
By the way, according to you, “all” Christian denominations believe the same way - namely, that Mormons are not Christians. Not sure if that’s true but I do know that many Christian denominations do not want to give up any of their power and money and prestige.
For all of the diversity among Christian denominations from Catholic to Southern Baptists from Methodists to the Eastern Orthodox, they do agree that Mormonism is a unique religion of it’s own, created by Mr. Smith of Vermont in the early 1800s and is not a part of the Christian faith.