Re my post, I went to the other thread and no one was contending that they weren’t a threat. Tactical criticisms, like the proximity of patrons, not sure I can determine that from the video though his line of fire lookes clear to me, and firing as they fled, a crime many places since the threat has ended, are legitimate.
I disagree that the threat is ended just because the goblins are headed for the door. If the guy still has a gun (he dropped it, but Williams may not have seen that) he can shoot while running away. And while his partner had a bat, he might also have a gun.
Under the circumstances, I think the shot fired at the door was understandable. You have two guys doing a lot of moving around, and you don't know if they're scrambling to their feet to run away or to return fire, especially if they turn while getting to their feet.
And if you hold your fire and you are wrong, they could kill you. I'm not giving them that courtesy when they started it.