28 And in fine, wo unto all those who tremble, and are angry because of the truth of God! For behold, he that is built upon the rock receiveth it with gladness; and he that is built upon a sandy foundation trembleth lest he shall fall.
This is one reason why some people become so angry about the restored gospel. When you are firmly established on the rock of Jesus Christ, you have no reason to be angry about what others believe. You have no reason to be angry or afraid if others are angry about what you believe. The last phrase in this statement from Nephi explains it. When you are not sure of your footing -- when you are built upon a sandy foundation -- you have to be afraid that you are wrong. And fear is the pit of anger from which it blossoms to all violence in hearts, minds, and deeds.