Recommended reading about Barça (and a little bit about Catalonia) at The New York Times: "Lionel Messi: Boy Genius".
(excerpt)
(...) But now they played for club, not country. Temporary brotherhood fissured. Blood rivalry resumed. Madrid, the capital, was once the base of Franco’s dictatorship and is now the seat of Spain’s constitutional monarchy; Barcelona sits in the heart of the autonomous Catalan region, with its own language and cultural (and soccer) identity.
⚡️ Thread with legal and historical arguments on "#Catalonia #selfdetermination” https://t.co/Z1lx1D1bdS
— Col·lectiu Emma (@CollectiuEmma) 15 de març de 2017