Modern football is no longer a place where tens of thousands of young men (and not so young) congregate and discharge their natural aggression in a relatively safe environment. A football match is now a cultural event indistinguishable from the cinema, the opera or horse trials. Fan segregation is dying at an exponential rate: expect to see completely mixed-allegiance and neutral crowds in most stands at most grounds in the next 3-8 years. What was once adversarial at all levels is now merely inquisitorial at a spectator level.
Modern football: neutered, inquisitorial, emasculated and sterile.