The Killers Are Mostly Apostate Nephites, Not Lamanites
Alma 24:28–30
28 Now the greatest number of those of the Lamanites who slew so many of their brethren were Amalekites and Amulonites, the greatest number of whom were after the order of the Nehors.
29 Now, among those who joined the people of the Lord, there were none who were Amalekites or Amulonites, or who were of the order of Nehor, but they were actual descendants of Laman and Lemuel.
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.
Elder Daniel Tyler reported:
“When the Prophet [Joseph Smith] had ended telling how he had been treated [by apostates], Brother Behunnin remarked, ‘If I should leave this Church, I would not do as those men have done. I would go to some remote place where Mormonism had never been heard of, settle down, and no one would ever learn that I knew anything about it.’
“The great Seer immediately replied: ‘Brother Behunnin, you don’t know what you would do. No doubt these men once thought as you do. Before you joined this Church you stood on neutral ground. When the gospel was preached, good and evil were set before you. You could choose either or neither. There were two opposite masters inviting you to serve them. When you joined this Church you enlisted to serve God. When you did that, you left neutral ground, and you never can get back on to it. Should you forsake the Master you enlisted to serve, it will be by the instigation of the evil one, and you will follow his dictation and be his servant.’
“He emphasized the fact that a man or woman who had not taken sides either with Christ or Belial could maintain a neutral position, but when they enlisted under either the one or the other, they left the neutral ground forever.”
(In “Recollections of the Prophet Joseph Smith,” Juvenile Instructor, Aug. 15, 1892, 492.)