As far as I can tell, there tends to be elitism with regards to sports and people who like them in communities like gaming and musicians. Thankfully, this seems to be a vocal minority, and most people just aren't interested. When I was at university a few years ago a friend and I were both on the committee for the rock music society, yet the rest of the society, who had known us for months or years and been perfectly friendly, would suddenly look at us in disgust when we told them we were going to watch a rugby match. Usually to the tune of "How can you like sports, only idiots like sports." It made me sad, because I knew these were completely ordinary and decent people otherwise, and they had no reason to behave like this other than it being the in thing to do.
Yes, a lot of people (or at least the loudest people) who like sports are complete jerks, but the same can be said for pretty much every group of people EVER. Some sports fans like getting drunk and starting fights, but this is almost always a small minority. I'm a big fan of rugby league, having grown up in a town where everyone follows it, and despite it being a violent aggresive sport the fans are amazing and get on really well. There's bitter rivalries and people can get angry or upset, but even then the fans can usually joke or banter with the other teams' fans. The players also get paid much more sensible wages, too.
Watching sports might not be interesting for everyone, but some people enjoy it, and at least a part of this is how much the teams playing mean to you. I find domestic soccer dull, but I'll watch international games when England play. I don't find American football or rugby union very interesting, even though they aren't very different from rugby league, because I have no opinions on the teams involved. If you don't like sports, that's fine, but don't expect everyone else to agree with you, because they won't, and that only leads to more unnecessary hate.
Finally...
teh_pwning_dude said:
Because there's only enough time to be properly obsessed with one hobby.
I'm afraid this is just wrong. I love playing TF2 whilst listening to the match on the radio, although it causes some strange chatter if I leave the xbox mic on!