Never heard of the Mormon wars?
They had had lots of wars with their neighbors...
They didn’t start the skirmishes. And, what is usually known as the “Mormon War” in Utah wasn’t a war at all. The US sent an army to Utah to put down a non-existent rebellion. When the army got to Utah, they marched through Salt Lake without firing a shot. The Mormons had left the city, had filled the buildings full of straw, and had left men with torches on every corner ready to set fire to the city rather than have everything they had built stolen from them again, as it had been in Missouri and Illinois.
The army marched through, set up a camp about 60 miles south and west of Salt Lake, and the Mormons did quite well trading with the military for the next while.