What are the grievances between the European football giants?

At present, the most bitter is Barcelona. Let's talk rationally. Barcelona's style of play will indeed make many teams suffer, and it is also the strongest team in Europe at present, and it is inevitable to make enemies everywhere.

There is no doubt that Barcelona and Real Madrid have the deepest grievances. Barcelona is located in a special area, has its own language and beliefs, and there is still a generation gap between Spanish speakers. This is difficult to explain according to history.

Ethnic contradictions, religious contradictions, political contradictions, etc. , have led to Barcelona and Real Madrid have been at the same level. Franco, the big boss who launched a coup dictatorship in Spain, actually killed the president of Barcelona because he was a Real Madrid fan, and forced Barcelona to sell players. The contradiction is not deep. This is history, and we can look at the history of tooth extraction in Spain without explanation.

Generally speaking, Milan and Inter Milan, Juventus and Inter Milan, Manchester United and Manchester City, Arsenal, Chelsea, Liverpool and Manchester United, these grievances are not small, only in football, but still not as deep as Barcelona and Real Madrid. ...