The phrase "Nevertheless, they call themselves of the holy city, but they do not stay themselves upon the God of Israel, who is the Lord of Hosts" in 1 Nephi 20:2 is changed in the King James Isaiah 48:2 to "For they call themselves of the holy city, and stay themselves upon the God of Israel." This change from negative to positive removes the condemning implications of the verse and declares that Israel depends on the Lord.
Continuing through verse 8 of 1 Nephi 20, the Lord declares to obstinate Israel that he had advised them in advance of the miraculous works that he performed among them so that they would not be able to attribute those works to the idols they had made. By subtle changes made to verses 6 and 7 in the King James version, the clear intent of the passage has been obscured, making Israel less accountable for her idolatry. [H. Clay Gorton, The Legacy of the Brass Plates of Laban, p. 68]