You are surely right there, but having played with a ton of kids from all nationalities as well (football, handball, whatever) this episode still stood out for me, because it was much more brutal than anything else I had experienced out of tournaments and "serious" games. The game in question here was not even a hotel tournament, it was just a "hey, wanna play a round"-kind of game.
However: as you rightly mentioned it is unwise to extrapolate from this one experience onto the character of a group of people (I added this in the post above). This was not my intention here, it was just a very memorable experience and I never quite understood why it escalated the way it did.