AndyRM
Elder Goth
I must admit I find tribalism like this utterly baffling, and this seems to be tribalism within tribalism. Maybe I'm missing a gene, or something, similar to people who find sprouts bitter and disgusting.
It's always been a thing in football. There used to be loads of rival "young teams" who'd cause havoc with infighting, but have (in Scotland at least) generally become more unified under "block" or "ultras" banners.
It's all a bit of a pastiche of European tifo/ultra culture, which in some countries can be pretty vicious, particularly in Eastern Europe.
Generally they're pretty good at self governing and it's usually a combination of singing and flag displays, but there's always an element which take things too far. Our ultras are good lads, and I stand with them when I can make a game, took my old man along once and it was quite touching to see how courteous they were towards him.