Yes, of course there are rude people everywhere, and I've heard of far worse being done on aeroplanes. And you're right, we have no proof that this is what actually happened (or didn't happen).

But Aggressor and Victim are the words I'd expect to be used for an incident like this, and to be fair to lusitano, only a Qatari could say that "he was Qatari and he was on board of a Qatari plane and therefore he had more rights than the other, foreigners"!