http://sportsillustrated.cnn.com/2011/writers/sid_lowe/02/25/Spain.referees/index.html?eref=twitter_feed
There are four main daily sports newspapers, all of which claim varying degrees of objectivity. None of which should claim any at all. El Mundo Deportivo and Sport are openly pro-Barcelona. Marca and AS, while projecting an image of national papers, are increasingly pro-Madrid. They support their teams and campaign on behalf of them. They are fanatical and manipulative. They like to see themselves as an arm of their clubs -- part of the fabric. They have become propaganda outlets, not newspapers. And, they think, being that way works.
They have created, or tapped into, a kind of footballing fundamentalism. Many supporters are so used to a virulent, agenda-driven media, one that sucks up to their side and seeks to sink their rivals, that those who are remotely critical of Madrid or Barcelona are now dismissed as anti-Madrid or anti-Barcelona. You're obviously a Madridista or obviously a culé, a Barcelona fan. You're not allowed to be neutral. You're not allowed to not care one way or the other.