Outraged by the Jan. 6 Capitol riot, a wilderness survival trainer spent years undercover climbing the ranks of right-wing militias. He didn’t tell police or the FBI. He didn’t tell family or friends. The one person he told was a ProPublica reporter.
I think the FBI said this more recently, around the Charleston church terrorist attack.
Its a well know fact that terrorist attacks in the US are mostly US citizens, white, male, and with a history of domestic abuse.
I wonder if they downplayed the fact that most of them are right wing, and not just vaguely right wing, but explicitly so.