Sadly, it seems to be the ‘human condition’ as a whole. It must be built in to our DNA to be rebellious, jealous, mistrusting, whatever.
Everything seems designed to create conflict/envy/confrontation, be it politics, religion or sports!!
Even movies and film music seem to create argument and disunity (in certain quarters), in what must be the nichest of niches.
I wonder if train-spotters or bird-watchers fight? 😉