So this is when the Anti-Nephi-Lehies covenant with the Lord that they will never shed blood again and then they bury their wepons of war. Shortly after an army of Lamanites come to fight them. The Anti-Nephi-Lehies refuse to fight back and the Lamanites kill 1005 of them. Then their hearts begin to soften and suddenly we see that a bunch of Lamanites become converted to the gospel. None of which are ex-Nephites aka Amalekites and Amulonites. The Lamanites who were direct descendants of Laman and Lemuel were less hardened than the ex-Nephites.
30 And thus we can plainly discern, that after a people have been once enlightened by the Spirit of God, and have had great knowledge of things pertaining to righteousness, and then have fallen away into sin and transgression, they become more hardened, and thus their state becomes worse than though they had never known these things.
Isn't that interesting. I guess that is why most of the anti-LDS stuff out there is headed up by excommunicated members.