Returning once again to Aaron’s accusation of boasting, Ammon now exults in his boasting. He is boasting in the Lord, and because of the Lord’s goodness he has been “carried away, even unto boasting in my God.”
Note that Ammon describes “this people” as “a branch of the tree of Israel, and has been lost from its body in a strange land.” While we do not have many occasions when it is clear that the Book of Mormon prophets have read the plates of their ancestors, this clear reference to Jacob’s analogy of the olive tree is a clear indicator that they did study those records, even when the neglect to specifically mention that they have.