“And it came to pass” your Book of Mormon showed itself for what it truly is, the violence promotion in verse 25 is “exceedingly” disturbing, “yea, even a sore” disturbance.
2 Nephi chapter 5 verses 21 - 25
21 And he had caused the cursing to come upon them, yea, even a sore cursing, because of their iniquity. For behold, they had hardened their hearts against him, that they had become like unto a flint; wherefore, as they were white, and exceedingly fair and delightsome, that they might not be enticing unto my people the Lord God did cause a skin of blackness to come upon them.
22 And thus saith the Lord God: I will cause that they shall be loathsome unto thy people, save they shall repent of their iniquities.
23 And cursed shall be the seed of him that mixeth with their seed; for they shall be cursed even with the same cursing. And the Lord spake it, and it was done.
24 And because of their cursing which was upon them they did become an idle people, full of mischief and subtlety, and did seek in the wilderness for beasts of prey.
25 And the Lord God said unto me: They shall be a scourge unto thy seed, to stir them up in remembrance of me; and inasmuch as they will not remember me, and hearken unto my words, they shall scourge them even unto destruction.
3 Nephi chapter 2 verses 14 - 16
14 And it came to pass that those Lamanites who had united with the Nephites were numbered among the Nephites;
15 And their curse was taken from them, and their skin became white like unto the Nephites;
16 And their young men and their daughters became exceedingly fair, and they were numbered among the Nephites, and were called Nephites. And thus ended the thirteenth year.
“White and Delightsome or Pure and Delightsome? - A Look at 2 Nephi 30:6”
mrm.org/white-and-delightsome