Legal shoot. You may not like the law, but the shooting was legal as the law is written. The law cannot be applied only to the person who we side with, or shares our values or skin color or anything else.
This is not about the handicap spot, or what the shooter did weeks before, or what race they both are. It is about what happened in the span of a few seconds where McGlockton pushed Drejka down to the ground, hard, and without warning. Where McGlockton then proceeds to approach Drejka on the ground. In those few seconds, Drejka can be reasonably assumed to have a fear for his life, even though McGlockton does appear to back off after seeing the gun.
Now, let's expand a little. Does Drejka actually know who pushed him down? He cannot. Was it related to the car in the handicapped spot? Was it some random guy looking for trouble? Was it someone who just stabbed the store clerk as was trying to escape? Drejka has no way of knowing but it doesn't matter. Again, Drejka might be an ass, but that doesn't matter either.
If you do not think so, I propose the following thought experiment (not to be carried out). You play Drejka (sans gun) and I will push you down hard 10 different times and you tell me if you felt threatened after each one. Now let's expand it - randomly for 1 of those 10 times, I will continue on to further assault you on the ground. Can you guess which 1 in 10 is that one beforehand? Or even after the initial push?
Of course the above is silly because the answer to any reasonable adult is that each time is threatening, with risk of serious brain injury or death. It just takes one time with your head bouncing off the asphalt the wrong way.
All it would have taken for this to not happen is for Drejka, McGlockton, or Jacobs to do one thing differently.
So.... if that shooter at the car window had first been shot by the woman inside the car, would that also be justified murder?
Based on the video, the woman Jacobs would have been at fault if she shot Drejka. He stands away at a reasonably distance and he appears to make no threatening gestures.