Since you have decided to make me the topic of this thread, I will not run away.
Yes, that is a recurring theme. I do not like to see people get in over their head and die. I am funny that way. I am also VFD, I will also criticize anyone who runs into a burning building without proper knowledge, training or equipment too.
And that brings us to the next point I want to make about shooting. Getting involved. We hear it a lot on gun forums, "do something", "at least he got involved."
From the Hippocratic Oath - "First do no harm"
Despite quotes taken out of context from Teddy Roosevelt, getting involved does no good if you make the situation worse. So before getting involved, ask yourself, 1) Do I have the skills to improve the situation? 2) I am I the best one on the scene to take action?
Knowing when NOT to take action is more important than taking action. Years ago when I was in my 20s, my younger sister and I happened on a car crash, we were first there. First guy was dead, second was alive, stable but impaled, third had cuts, broken bones, some bleeding. Sister went to work on guy #3. I called in 911 giving directions and details.
Others stopped "to help". They decided to remove the dead guy from car, and then remove the impaled guy. I saw this before they did it, I forcefully told them to leave him alone. They did, They thought it was their duty to "get involved". They wanted to be Good Samaritans. They did not understand rule #1 as they did not have the skills to make the situation better, only worse, they almost killed the impaled guy. They fail at rule #2, they had no training and my sister was a ER attending physician. She was most qualified on the scene. She had already triaged the scene and was working on the guy who while not having the most injuries, needed the most help. She knew impaled guy would bleed out in seconds if pulled from car, wait for EMT who have the proper tools.
What does this have to do with shooting? Clerk probably sees several drunk customers a day, knows how to handle them. He was most likely best person to solve the problem and had the skills, as well as knowing the house rules. Despite good intentions, shooter unfortunately turned a non-violent verbal encounter into a deadly shooting. So before being a Good Samaritan, know rules #1 & #2 and "First Do No Harm".