Casillas brought a lot of this upon himself. I don't think booing players is a good idea, let alone booing a club legend, but in his last years of his career Casillas has soured his relationship with teammates and fans based on plenty of his own actions. His unwillingness to realize his own decline and his ego are tarnishing his Real Madrid legacy.
I thought he had an excellent game...
Well...it's not him who picks the lineup.