Butch Cassidy was born in southern Utah and was raised as a Mormon.
Some of those can’t be mass murderers.
They don’t have a middle name....
Sample short list of other Mormon murderers (excluding list of Mountain Meadows Massacre) ... Mormon Murderers
Wild Bill Hickman (left) and Porter Rockwell (center) were two of the most notorious serial killers in U.S. history. Hickman is credited with murdering 14 people, all under direct orders from Brigham Young. Rockwell's total is usually given at at least 150, although nobody really knows the true amount. His tally does not include the 36 soldiers who perished after the ambush of the Fort Bridger food convoy at the start of the Utah Mormon War of 1857 (Porter led the raid), or the 450 or so Indians that were slaughtered at the Bear River Massacre (Porter guided the army to the killing scene and picked off numerous women and children that were trying to escape the carnage. Almost all of his killings were sanctioned by Joseph Smith and Brigham Young.
John D. Lee (right) participated in the Mountain Meadows Massacre, where another 120 or so men, women and children where murdered. Lee was the only person to be tried for the murders, and was later shot by firing squad at the site of the killings. His Confessions, written between the time of his trial and execution, chronicles the church sponsored killing of dozens in Ohio, Missouri, Illinois, and Utah. When reading the document, look for the code words used up.
In addition to the 570 (plus or minus) murdered at Mountain Meadows Massacre and at the Bear River Massacre, your short list also omits the casualties from the Missouri Mormon Wars (around 50 plus or minus), the Illinois Mormon Wars (around 20 plus or minus), the Utah War of 1857 (around 150 plus or minus), the Atkins Massacre (around 20 plus or minus), the six Mormon Civil Wars (chronicled by the historian Hubert Bancroft term - total unknown), the blood atonement killings (I've seen estimates ranging from 800 to 2,000), and the eight named Indian wars and dozens of unnamed Indian skirmishes (total unknown). Thousands more have been beaten and/or castrated over the years by Mormon vigilante mobs; many thousands more have suffered abuse under plural marriages.
Mormonism has a terrible legacy of violence, indeed.