Today's police are taught "Confrontation Uber Alles!". That goes double for SWAT police.
We can safely assume that Reeves was being Pavlovian in response to a peasant defying him.
See, a normal CCW holder would have left the scene. Not so with a Confrontation Boy. We can view the sad results of this misguided policy in this instance.
Heck yeah I would have left or at the very least moved. With only 23 other people the place wasn’t very crowded.