Moroni would like to put fear into Ammoron, and the thing that Ammoron should fear the most is the judgment of the God he has rejected. Moroni indicates that he knows that Ammoron has rejected these teachings (v.8). This suggests that Moroni does know that Ammoron is an apostate Nephite. Therefore he ought to fear the justice of God, but Moroni knows that he will not. Regardless of whether or not Ammoron fears God’s justice, it will nevertheless be visited upon him.