Disappointed that he didn't shoot everyone in sight are we?
Not in the least. (And I assume you do not intend to include DoodleDawg in that “we”).
LEO drew-down to appropriately intimidate and show the aggressors that he was in charge of that situation. He had his hands full of the “schiksa”.
I posit that he had full knowledge of what the possibilities were given the anti-LEO sentiments in the current culture.
If I were on the investigatory Board, I would, likely, find him in violation of local policy but not in violation of protecting his personal safety.