they can't, but that's the point. they were talking then and they had been talking before and we don't know who started and whose words were more insulting (which is a subjective matter anyway). I certainly don't condone insults of any kind, but trash talking goes on in many sports and it does not justify physical aggression. period.
As said before, if it was that bad, you bring it out after the game.
As far as the Golden Ball, the votes were in before the episode, and I think he wouldn't have gotten it if journalists had voted after.
Macky, maybe not many people know him here in north america, but he is probably much (MUCH) better known in the world than any north american athlete, bar none. he is the best player of the last 20 years of the most popular sport in the world, and he is adored by millions in north africa and france. he would have never tarnished his image in that way for money (of which he probably he has more than he needs anyways) with the chance of loosing himself and his country a second world cup.
edit: beat by jaffa. Didn't matterazi play in england for a while?