The legal trickery used in this incident is astronomical. The cops were out of jurisdiction, so had no authority to act against the thugs, but could immediately act against a "threat" that produced a weapon, and that was the plan, to provoke the homeowner or family into a "brandishing" crime or other tort basis.
Legal trick: the out of jurisdiction cops cannot enforce the homeowners "trespassers get off my property" order, or any violation of required demonstration permits and demonstrator requirements (like: must keep walking), only local cops can.
The cops were in uniform but acting as private citizens, then ?
Can you strap on a pistol, walk out and start “watering your lawn” (including hosing down any scumbags that don’t get off), or is that brandishing, too?
In simplest terms, they’re trying to provoke a race war to give them license to kill whitey and any other conservatives.