Iirc, the Mormons only killed the men—AFTER promising not to. Then they forced the grieving widows to immediately wash all the blood out of all the clothes, a task that required three days to complete.
The lying, murderous men then took the widows and any girls deemed old enough as wives. It was no different than the Muslims would have done—vicious, barbaric and dishonorable from start to finish.
The Mormons always reminded me of Islam, because of the desert thing, I decided.