I couldn't blame anyone for being completely unmoved by England just now.
What I do find sad is someone who actively supports their national teams opponents.
Why? Have you never preferred a non-British player or team in any sport over the English/British player or team?
It has nothing to do with hipsterism or whatever you appear to be attributing it to. Well, maybe it does for some, I can't speak for other people.
But sometimes the 'foreign' opposition are just so clearly better, more skillful, more driven or whatever it is, that you just prefer them and don't really care about nationalism.
For example, in tennis, there's no way on earth I would want Tim Henman to beat Federer or Del Potro or Murray, even though I'm English. That has fuck all to do with hipsterism. I love tennis, and those players are much, much better to watch, have a much bigger range of ability and arguably have much higher intensity.
I find it sad that people are so attached to jingoistic nationalism, over loving the actual sport they are following.