I'm spanish.
So:
1. That's why because for Real Madrid, Rodri is that boy who is an Atlético fan.
If Haaland had won, no problem. Or Kevin. Or Foden.
But the problem is Rodri. He is an Atlético guy in their heads.
They just see this:
2. Rodri's words, about Vini and about "where is the señorío?".
Vini is a provocative player.
The "señorío".
"Señorío" is a noble spanish title within the aristocracy. But "to be a señor" means 'to be a gentleman'.
So Real Madrid fans are all day and all life saying "we are a señor club, we have señorío". But THEY ARE NOT señores. They behave contrary to that.
So all people laughs about it. Not only Rodri. Everyone is ironic with them and the 'señorio madridista'.
An exemple, look at the title: SEÑORÍO MADRIDISTA:
First boy is saying: fuck Barça and fuck Catalonia. Next girl is saying "I want that catalan people die".