He gave the leftist enough rope to hang himself, and he did. Let the fish run a bit before setting the hook is the analogy comes to mind. So in this situation, peaceful engagement was the correct play - leftist, violent, irrational, video taken, nuttiness on display for the world. I think there are times to call police and times to not. Fearfully crying like a bitch for the police to save you is weakness and embarrassing. Compelling law enforcement to do their job once an unprovoked assault was documented, strategic. He would have either: documented dereliction of duty and selective enforcement, or the arrest. Well played.