1)In your temple, who is God?
2)Who is Joseph Smith?
Why would you focus on Christ's death from the cross? The cross if anything represents what Jesus did for us to inherit eternal life because that's where you have to go to get it!
Why ignor the major premis of God's teaching?
God is God. He is Heavely Father. He is the one in charge of everything.
Jesus Christ is His first beggotten Son.
God the Father and Jesus are not the same person. No we don't believe in the Trinity. The Holy Ghost is the messenger of the Father to men.
God the Father created everything and everyone spiritually first before they ever came here.
After the spiritual creation, and under the direct direction of Heavenly Father and through the Father's power, Jesus Christ created this world and everything on it.
Afterwards Christ himself came down to be born of mortal man to Atone for the sins of the world. He is the mediator between God the Father and fallen man. In a most literal sense, Christ is the God of us all because He is the Creator. He and His father are still two different people though.
No matter what one does as in good works, no one can ever earn their way to heaven. One must be obedient to Christs teachings though because He is the mediator and judge of us all.
He can mediate for whoever He chooses.
If we are not obedient He can choose to cast us off forever.
Because of Christ, all of us have a chance to return to live with Heavenly Father. We must though be obedient to the teachings of God to do so.
Who is Joseph Smith? He was the first President of the Church. There was only one Christ and hence really only one church. Truths are Eternal, meaning they never expire, even in Heaven.
Joseph Smith was kind of like Moses who went to get the 10 commandments from the mountain.
Joseph was a prophet who was called by God to be taught the doctrines of God and Christ that were lost over the ages as men continually opened their own religions unto all different types of things.