I’ll say this: It is extremely unlikely I’d pull a gun and shoot someone for shoving me to the ground! I might PULL a gun in case the other guy was planning on following it up with more, but I don’t see a reasonable belief that the shooter’s life was in danger (nor serious physical harm).
At a guess...I’d charge the guy.
I was very small when I was young and was physically bullied a lot. It made me stronger and taught me to fight back when odds were against me. It also taught me bullies are generally cowards but WILL beat you up if they are bigger.
So I have a HUGE resentment for bullies and when I see one get taken down — even all the way as in this case — I can only feel satisfied.
In general I don’t buy that “boo hoo hoo my childhood made me like I am” but that doesn’t mean we don’t bring impressions forward.
Given the person who violently assaulted the person on the ground and was perhaps one second away from him if he wanted to finish him off with his fist or a knife, how long would you contemplate pulling a gun for self defense and using it?
Whether he was justified in shooting the guy is another issue altogether that doesn't look like a clear call.
You knock me to the ground and if I have a gun, I will shoot you EVERY SINGLE TIME. I am not a human punching bag and NO ONE gets freebie hits to me!