Have you read any Dumas? Seen a Three Musketeers movie? Insulting someone is punishable by death whenever possible. At least, in those societies, and that happens to be the society Anton comes from. The nobility will have such people tried in a court (it's illegal to insult most nobility) and hung, the rich will pay for sellswords and snipers, the middle and military classes tends to have duels, the poor will stab you outright, and the beggars don't care one way or another.
That's the Fantasy stereotype, and Anton's society, and acting according to the dictates of his society isn't an Evil act, and Anton will try not to avoid it. A LG character or priest might have dueled to first blood if he considered himself a pacifist, but that's kind of stretching it.