The QAnon Cult Leader in Dallas Has an Allegedly Violent Past

When pictures started circulating in early November of QAnon supporters crowding Dallas’s Dealy Plaza, where John F. Kennedy was assassinated, in anticipation of the second coming of the slain president and the arrival of John F. Kennedy Jr., his dead son, it became a political Twitter joke.

Now, some three weeks later, some middle-aged and boomer QAnon followers are still there, and the incident has more clearly shifted from a laugh to something enduring and darker. While the event’s organizer, Michael Brian Protzman, and his followers have so far only been...