Splinter groups from the LDS Church (which isn't exactly free of pateralistic chauvinism) have quite a history of sex and violence. James Jesse Strang's "kingdom" and his eventual murder on Beaver Island, Michigan is but one example. The LDS Church itself can be held responsible for, among other things, the Mountain Meadows Massacre; Porter Rockwell is still a name that will conjure up dark history.

You might take a peek at John Lee's "Mormonism Revealed" -- Lee was the man eventually executed for the Mountain Meadows killings and an early follower and friend of Joseph and Hyrum Smith.