Is this the point that's supposed to justify the rest of the post? Because it sounds like the people you know are assholes.
That's an extreme example to illustrate my point, yes.
TL;DR - Born & raised in Miami; fan of local teams since 1988. Also ended up being a fan of several other city's teams.
------
My overall point still stands though. I live in Miami now, born and raised. I follow a lot of sports, but lets stick to hockey here. Growing up, there was no local team, so when I could actually watch a game I would. I ended up following the Penguins the most, mostly because of Lemieux. Finally, a somewhat local team shows up in the Tampa Bay Lightning in '92, so I start following them since I can more easily watch their games. The Panthers come to town a year later, but I do the sports team thing and more or less stick to mostly watching "my team", although I did watch the Panthers often enough.
Then came 1996, the Year of the Rat. That year, I still rooted for the Lightning. All the way up until the Panthers were in the playoffs and I was lucky enough to get tickets to a game. I was there twirling plastic rats with everyone else. I still have two of them in my closet as souvenirs. Hell, I still remember staying up to watch their refusal to go down easy to a sweep to the Avalanche in 3 OTs in Game 4 of the Finals.
Since then? I follow them both. Push comes to shove, I'll say I'm a Lightning fan, but really for no other reason other than they were first. And realistically? Aside from the Lightning's recent run, and the Panthers surprising everyone last year, there hasn't been much to follow for the last 15 years. I was rooting for the Canucks at some point there.
I can get into other examples. I've been a Heat fan since the Timmy Hardaway days, but I lived in Sacramento when Bibby and Webber were giving the Lakers headaches. The Dolphins are my team, but they've been an increasing disappointment my entire life. Marino never got the ring he deserved, and it's been woeful since. I made do by enjoying teams like the Steelers and Ravens with their hard-nosed style of football over the years.
------
TL;DR End
So, at many times in my life as a sports fan, I find myself rooting for another team that's not "mine". But then,
If you move, you still keep the same teams.
Now I'm not singling out Jitters here, more that I'm pointing out that this is a common sentiment among sports fans. "You live with the team, you die with the team." If you show anything other than unyielding loyalty, you're seen as somehow a lesser fan.
Since my first example was extreme and sucked, here's an actual recent example. I mentioned to some co-workers that as much as I'm supposed to hate the Celtics as a Heat fan, part of me was rooting for them in the first round against the Knicks. Watching that old guard put up a hell of a fight and go down swinging in the last few games was admirable and inspiring to watch, rival team or not. The Bulls' infirmary squad gets a similar sort of admiration from me. Of course, the look of disbelief on everyone's faces as I said that was interesting, to say the least.