If Jesus Christ came down (as he will someday) and personally declared that he was just as okay with Mormons as he was with Baptists, Lutherans and any other denomination which worshiped him, there would be a certain crowd who would immediately denounce him as a sellout and claim he was Unchristian.
False, Jesus will not reject Christianity and the bible.
All Christian denominations Orthodox, Protestant, Catholic, agree that Mormonism is not a Christian religion, or part of Christianity, but that it is a different religion, made up by Joseph Smith.