Maybe it's more about promoting a friendly rivalry? Outdoing the other nation is a ceremony would increase tensions but not in a harmful but in a competitive manner. I personally see it as a positive thing as long as no one starts shooting.
It's all fun and games until someone starts shooting. It does seem to be in good fun and incredibly silly. Things like this, along with sporting events etc, when done right, can be really great ways to bring 2 rival nations together.
Maybe we should introduce them to the wonders of American Football and have them use those as a proxy for any disputes they might have. In the event of a tie* have both teams play a full game of Rugby. No pads allowed. I'm sure that'll fix any problems they might have. *: Yes it is possible to tie. Came as a shock to me as well. :( my poor Niners...