As I understand it he was not at the appropriate speed for the manoeuvre, was too low for the manouevre, and should not have been executing that manoeuvre over the road. All this was apparent at that moment. Oh and it was apparently no surprise it was that pilot.
I don't like people using terms like "scumbag" but I am not sure that the anger against Andy Hill is a poor reflection of today's society. The anger is deserved. I would have thought in the past society might have treated the bloke a lot worse.