did they think the ball handler was out of bounds? OR the clock ran out?
I doubt it was the shooter being off the court.
Could be wrong though
Can't speak to state of mind - but both immediately went to the ref and pointed to the sideline, not to the clock. Seems to me they were talking about being out of bounds, not the clock running out.
The thing about refs is that they are human, and they also make errors - just like players and coaches do. If a player loses track of their defensive assignment and their man then makes an easy layup, I don't think anyone would expect him to apologize publicly to the fans. Players screw up all the time, and so do refs.
What I don't like is the fan-shielding of refs as though they never make mistakes, or that they should be immune to criticism when they do. We can get on players for taking bad shots, or making bad passes, or committing bad fouls, or whatever - they get heaps of criticism. But criticize a ref and the apologists usually come out of the woodwork.
Some players are better than others, and some refs are better than others. Great players make boneheaded plays sometimes, and great refs blow calls sometimes. Mediocre/poor players are sometimes forced to play extended minutes, and mediocre/poor refs are sometimes assigned to call your games.
Neither should be immune to criticism, though - all performance should be fair game for comment.