Zidane's attitude with him in the press has been pretty sour of late so it does sound like there's a lot of bad blood behind the scenes.
Real Madrid fans are fucking retards - they are the only side to win the Champions League and the next day they want the manager and certain players gone. They hold grudges against players in such a way, they boo them even when they score or touch the ball; sometimes for months on end. Bale was booed week after week, scored the winning goal in the CL final and then was still loathed by them.