Not everybody is close enough to a big city to root for all its teams, not everybody stays in the same spot throughout their childhood, and not everybody has parents who have sports allegiances to pass down. Weird things happen when young kids basically have to pick their own teams. Nobody cares about them. If people are weirdos and root for teams all over the place, who the [expletive] cares. That said, even that makes more sense than rooting for all of your teams from one city and then having one team stand out from the rest, AND that team is such a hated rival of the city all of your other teams play in. Again, think of someone rooting for NYC and Philly teams. It's madness, and quite possibly some intriguing form of schizophrenia.