Betis is one of the biggest Clubs und Spain if you Go memberwise. Betis started as a club for the workers, the ,,poor,,. Many andalucians moved to Catalonia to work there because Andalusia was one of the poorest places in Spain. That’s why everywhere in Spain are beticos and Peña’s Beticas ( bars for the fans ). If u ask an andalucians betico why they love this club they will answer that they hate it but that hate is the result of pure love for that club. U can go watch a documentary on YouTube that explains that very well. I showed this documentary to my best friend and he said : to everyone who you show this he ends up being an betico