I'm not sure if that was anger of just that call of a culmination of bad calls during the game. Reffing in the NCAA has become horrendous and seems like it is worse this year due to the new rules. It seems like the new rules are selectively enforced at times.
It seemed like a combination of that and the similar play when Duke had the ball and it was called blocking on Syracuse. I think that seems to be the number one complaint I have been hearing is the inconsistency of the calls. Like an umpire having a different strike zone on each pitch.