You can dislike Casillas for whatever reason, or think that he is not playing well, but what are you trying to achieve by booing? I have never understood this. What is the plan? What are you hoping will happen by booing your own player, your captain? I can’t think of anything positive happening from doing this and whatever you are trying to do, it’s not working so maybe try something else?
It worries me that players, seemingly over night gets very angry and bitter and wants to leave. What are we doing to them?