Probably have less murderers per capita throughout history than the general population. I do consider the Mountain Meadows perpetrators murderers, as I consider the Haun’s mill perps murderers and the Carthage lynch mob murderers.
Perhaps it is less per capita. I responded to the claim of “never”. Since you agree that those things were murder, then you must also agree that “never” is incorrect, justified or not.
Think back to the Articles of Faith.
11 We claim the privilege of worshiping Almighty God according to the dictates of our own conscience, and allow all men the same privilege, let them worship how, where, or what they may.