How so? Coffman was one of the "protesters."
https://www.justice.gov/opa/pr/alabama-man-pleads-guilty-fir...
Coffman admitted in the plea agreement that he exited the pickup truck at 9:20 a.m. and walked in the direction of the U.S. Capitol Building, and towards a rally near the National Mall. Inside the pickup truck were several loaded firearms within arms-reach of the driver’s seat, hundreds of rounds of ammunition, large-capacity ammunition feeding devices, a crossbow with bolts, machetes, camouflage smoke devices, a stun gun and a cooler containing 11 mason jars filled with ignitable ingredients for Molotov cocktail incendiary weapons. Coffman also carried a loaded handgun and a loaded revolver as he walked around the area that day. A search of Coffman’s residence in Alabama later that month led to the discovery of 12 additional mason jars containing ignitable substances, each constituting the component parts of Molotov cocktails.