You statement might be valid if mormonism were in any fashion a Christian denomination - it is not so your statement fails.
I didn’t say Mormonism was Christian. I said that most religions that claim to be Christian, which is why I used the scare quotes, have somewhat similar episodes in their past.
But most of them are from the 1600s or before, not the mid-1800s.
We didn’t have an episode as appalling as the Mountain Meadows Massacre even during our Civil War.