Because managers are not gods. They do not make the club, they do not understand or love the club like fans do. Some will say Mourinho is different and he does, but he doesn't. The fans make a club, without the fans, the club is nothing. The fans cannot stand Gerrard or Liverpool and make that very clear week in week out, just because Jose likes someone it doesn't mean the fans should. Absurd to let a manager dictate how you support your club.