I don't see this as a problem. It actually shows that the coach has balls to bench a quality player to send him the message that this is a team game and whining wont be tolerated. This is seen in the NHL, NBA, and even the NFL. Top players have been benched if they cross the coach for a period, a half, or an entire game so the message is sent.
I like Cholebas but, in all honesty, he does seem to be one of those whiny bitches who pouts and cries if he doesn't get his way. Team first. Period.
Good for Skibbe.