Good grief, really? People here really can't get their head around other people caring about things they don't like?
This is just life 101 isn't it? We're not the same, and that's fine.
There's much wrong with football; but that fans of it get (non-violently) emotional about it is absolutely not one of them.
And no, it doesn't mean they've got otherwise empty lives; there's no exclusivity to caring; I care about my family, my pets, myself, my sport, my hobbies, my future, my next bit of chocolate, my latest Netflix series, my job.
I can, like most people, care about one of them, without diminishing how much I care for any of the others.
Judge them for beating each other, judge them for racist, sexist, homophobic chants, but don't judge them for showing emotion.