L. Tom Perry
"The message of this story is not that all members of the Church should conscientiously object to war. There is also a Book of Mormon story about Captain Moroni raising the 'title of liberty' as the leader of the true believers in Christ (see Alma 46:11-14). Moroni made impassioned speeches and wrote spirited letters to his Nephite brethren about protecting their liberty, lands, wives, children, and peace (see Alma 48:10). It was the Anti-Nephi-Lehies' unique history that caused them to make a unique covenant with the Lord that they felt an obligation to honor. When they honored their covenant they were blessed, and their brethren, the Lamanites, were also blessed.
"While the message of the story is not to insist on universal pacifism, we do learn that by not returning aggressions from others we can have a profound effect on them. Literally, we can change their hearts when we follow Christ's example and turn the other cheek. Our examples as peaceable followers of Christ inspire others to follow him." (Living With Enthusiasm, p. 128)