Jesus, according to the felon and convicted fraud Joseph Smith, said that at the first vision, which is as credible as the Kinderhook plates, the seer stone, an Egyptian funeral papyrus and that talisman coin that Smith had in his pocket when he passed away in the jail shootout.

It wasn't just about creeds. Clearly, the LDS prophets spoke against the Christian Church and Christian doctrine.

The LDS church does not impart priesthood.

The LDS church doesn't point to Jesus, the Savior, God's only Son. It points to a man made Jesus that is conceived by Mary through a physical relationship and one that is the brother of Satan.

“Christ was begotten by an immortal Father in the same way that mortal men are begotten by mortal fathers.” (Mormon Doctrine, 1966, p. 547)

On first hearing, the doctrine that Lucifer and our Lord, Jesus Christ, are brothers may seem surprising to some—especially to those unacquainted with latter-day revelations. But both the scriptures and the prophets affirm that Jesus Christ and Lucifer are indeed offspring of our Heavenly Father and, therefore, spirit brothers….But as the Firstborn of the Father, Jesus was Lucifer’s older brother. (See Col. 1:15; D&C 93:21.)

We needed a Savior to pay for our sins and teach us how to return to our Heavenly Father. Our Father said, “Whom shall I send?” (Abraham 3:27). Two of our brothers offered to help. Our oldest brother, Jesus Christ, who was then called Jehovah, said, “Here am I, send me” (Abraham 3:27)….Satan, who was called Lucifer, also came, saying, “Behold, here am I, send me, I will be thy son, and I will redeem all mankind, that one soul shall not be lost, and surely I will do it; wherefore give me thine honor” (Moses 4:1).

Mormons don't have the same Jesus, nor do they have the same way of salvation.

We haven't even gotten to the LDS doctrine of becoming little gods, planet Kolob and/or populating our own planets via multiple wives yet.