Dunno. Looked like a test to me. Someone said, “trot a few kids in blue out there, put a girl in with them, see what the Americans do, for 5 minutes then walk away”.
Oh yes, they would like an excuse to play military. But with video being made, they are cautious about being caught inciting a riot. Would look really bad to see an 88 year old Vet shot up by DC idiot Police.