I think its perfectably reasonable to have an extra level of positivity for your own athletes. As long as your support doesnt become irrational and strictly confined to your own nationality. I once remember seeing a Skate America poster with the sign "Go support Team USA." I dunno but going to an international event with all these amazing skaters from other country and you're just going to cheer for your own skaters doesnt sound rational.
I actually don’t find a banner to be irrational. At various comps, there are plenty of banners “Go skater X” and to see a banner “Go team X”, well, like I said, it’s outside my frame of reference, but it’s only a banner. And to me, it’s cheering, it’s not saying “I only like Team USA”.
But when someone actually *only* likes skaters for a particular country or coach, that is outside my experience. I love Jason Brown. I would love him if he skated for the US, for China, or for Tanzania. I love him if he is coached by Kori Ade, Brian Orser, or the man in the moon. I love him when he skates well and I love him when he doesn’t skate well.
I expect everyone to feel the same way about their own favorite skaters.