I can't speak for luke,but I don't think anyone is going to argue that it is ugly behavior. My point is that, one instance doesn't reflect how a person normally behaves. We have had racers who yell at locals (or demean them all the time. That personally bothers me a lot more, then what so far as been a single instance.
After going through every season with a fine tooth comb, I don't think there has been a racer (to make it near the end) who hasn't at one point of another lost their temper. Be it with a local, a service personell, with fellow racers, or with their team mate.
I mean look at Danny & Oswald two racers who are considered extremely friendly to locals, they have insulted cab drivers, told them they can't speak their own language and threatened to kill one. All in one leg. Was it shitty behavior, of course it was. But was that instance something that really reflected how they normally treat others?