The Spaniard believes there are people who sit in Los Blancos' executive boxes who have accused Barca stars Neymar and Lionel Messi of tax fraud, and suggested that they would not do the same to their own superstar Cristiano Ronaldo.
"I don't like the values Real Madrid transmit, although there are players there I really appreciate with and am friends with," he said, according to ESPN.
"I don't doubt Raul's loyalty to Madrid, but I'd never work at Real Madrid.
"What I don't like about Real Madrid is how those in the box seats pull the strings. The person who accused Messi and Neymar and who has a different treatment for Cristiano Ronaldo is in those box seats.
"I don't know the name of the judge. We aren't going to keep a (grievance) list like (Jose) Mourinho does. We know how this works. Like this one, there are others."