Nothing new, it has been happening for decades over there.
i still remember watching on TV in 1985 when Liverpool hooligans rushed Juve fans, causing all those deaths.
Even as a kid going to games back in the 80's, I can't remember ever attending one where I have not seen a fight.
"Pioneers" of this behavior were Zulus, inter city firm, headhunters, bushwackers etc.
Every hooligan in my country has always looked up to these guys going back to 70's.