So is assuming that because of that rabid officers actions, there was a safe outcome where everyone went home alive.
No assumptions from me on that point. I'm sure the same end result could have been achieved by an infinite number of sequences of actions. We just happen to know part of the sequence in this case (the part videoed) and we know the outcome was that no one was seriously injured of killed.
I'll add that, based strictly on the video, I was impressed that the officer reacted as quickly as he did to an immediate threat approaching him from behind. I was particularly impressed that his reaction had him pull his gun yet apparently never place his finger on the trigger. He didn't have time to analyze anything. He only had time to react. He reacted to preserve his safety, yet to also refrain from the next step before firing a round, which is placing one's finger onto the trigger.