I mean... Some of them planned to kidnap a state governor. Pretty sure this was around when parts of the electrical infrastructure was getting shot up. There's probably more I could find easily if I bothered to look it up. Violence definitely happened, and it came from people who held those beliefs as a result of those beliefs. It was a group worth keeping an eye on

They may have applied the label more broadly than they should have, though. Not everyone who held those beliefs got violent.