“...both the Nephites as well as the Lamanites created their own “truths” about each other …These “truths” fed their hatred for one another until it finally consumed them all. Needless to say, there are many examples in the Book of Mormon that contradict both of these stereotypes. Nevertheless, the Nephites and Lamanites believed these “truths” that shaped the destiny of this once-mighty and beautiful people.”

Elder Uchtdorf

https://www.lds.org/broadcasts/article/ces-devotionals/2013/01/what-is-truth?lang=eng