Nephi takes the records and the other accoutrements of leadership and departs into the wilderness (2 Ne. 5:12). Four hundred years later, Mosiah does the same thing (Omni 1:12-14; see Bradley, p. 265). A generation later, Zeniff leads some Nephites back to the Land of Nephi, and he tells us that the Lamanites hate the Nephites because of the actions of...Nephi (Mosiah 10: 12-17; see Belnap, p. 25). Not Mosiah, who stole the same stuff, and much more recently. Mosiah might not even have been royalty, just some dude (Omni 1:12; see Bradley, p. 245). Why are the Lamanites still worked up over Nephi's actions and not Mosiah's?
Belnap, Daniel L. (ed.). Illuminating the Jaredite Records. Provo, UT: Religious Studies Center, 2020.
Bradley, Don. The Lost 116 Pages: Reconstructing the Book of Mormon's Missing Stories. Salt Lake City, UT: Greg Kofford Books, 2019.
Skousen, Royal (ed.). The Book of Mormon: The Earliest Text. New Haven, CT: Yale University Press, 2009.