Another thing to consider is the atoning sacrifice of Jesus Christ. Do you think that any mortal man could have suffered for the sins of all mankind and lived through it? Wouldn't this take super-human ability?
In my faith we have the following scripture:
Doctrine and Covenants 19:16-19
16 For behold, I, God, have suffered these things for all, that they might not suffer if they would repent;
17 But if they would not repent they must suffer even as I;
18 Which suffering caused myself, even God, the greatest of all, to tremble because of pain, and to bleed at every pore, and to suffer both body and spirit—and would that I might not drink the bitter cup, and shrink—
19 Nevertheless, glory be to the Father, and I partook and finished my preparations unto the children of men.