How did I not hear about this?
Apparently it has been a "thing" for radical right-wingers to invade government buildings and threaten federal workers for years. They are rarely charged with any crime, or they are arrested and later let off the hook. T***p has pardoned several of these repeat agitators. Other politicians pander to them as well.
No wonder the rioters last week thought they could get away with insurrection. Here's a brief overview from NPR's _All Things Considered_.
https://www.npr.org/2021/01/11/95572...in-western-u-s