Football and community building

We can often find something larger than ourselves in communities. Football in the contemporary world is a way of building communities, as it creates a sense of belonging. Each club has its own history, its own successes and its own failures. Some clubs pivot more towards one camp than the other. A club might have its own style of football; it might be more expansive or defensive. Some clubs might have a history of prioritising youth whilst others tend to sign players. Even the fans themselves might have their own individual characteristics. Some fan bases might have a good reputation whilst others might be more belligerent. Each team also has its own rival and derby.

Additionally, a club might be founded by a particular industry, so a club might be associated with a particular economic resource, such as steel. In other instances, clubs might be associated with political allegiances. For instance, Roma is the leftist team in Rome whilst Lazio has a fascist past. Certain clubs are sometimes associated with certain classes. In some cases they are more working class, in others they are more upper crust.
Nations experience real unity when their national team plays. It is one of the times that political and social differences are cast aside and when the whole nation come together. So, although it is a completely tribal game, it can sometimes transcend tribalism. 

Ultimately, people should support their local clubs. They form part of the communal nature of clubs in that way. One of the effects of globalisation is that people support clubs in other cities because they have the best players and spend millions on advertising.