The Zoramites had forsaken the counsel and teachings of the true Church as well as of the law of Moses.
“The Zoramites Were Dissenters from the Nephites”
How often it is the case that those who were once enlightened, those who once had known the sweet joy of membership in the Lord’s kingdom, become the bitterest enemies of faith (see Alma 24:30). Sinning against light always leads to grosser darkness.