Did you ever look into the meanings of some of the hymns you sing at the LDS church?
Oh Ye Mountains High was a cry to battle when the United States Army was going to stop Mormons from forming their own country; events that led up to the Mountain Meadow Massacre–a massacre of 120 non-Mormons by Mormons and Native Americans of an apparently non-military wagon train passing through Utah in the 1800s.
Amazingly, this song is still used today. I looked it up as I couldn’t recall the songs they sang when I was a girl.
Reference: The Mountain Meadow Massacre by Brooks