D&C 137:7-9; “Thus came the voice of the Lord unto me, saying: All who have died without a knowledge of this gospel, who would have received it if they had been permitted to tarry, shall be heirs of the celestial kingdom of God; Also all that shall die henceforth without a knowledge of it, who would have received it with all their hearts, shall be heirs of that kingdom; For I, the Lord, will judge all men according to their works, according to the desire of their hearts.”

Galatians 5:3-4; “For I testify again to every man that is circumcised, that he is a debtor to do the whole law.  4 Christ is become of no effect unto you, whosoever of you are justified by the law; ye are fallen from grace.”

This obviously contradicts Moroni 10:26.