There's part of the problem. Bad gun control laws, which abound in California, generate the impression that citizens carrying guns (openly or concealed) is somehow bad. That's wrong.
I would guess there are some areas in California where citizens open carrying an ak-47 is not a good idea, and where it shouldn’t happen. We all agree that we want law abiding citizens to have guns and the existing gun laws that prevent criminals from owning and carrying to be enforced. Open carry and concealed carry is not for everyone. Just my opinion. The kid wasn’t guilty of anything... well I guess he threatened some people? Yet, who knows.... I’d guess if this cop didn’t save someone’s life (future) he at least saved someone a lot of pain and the tax payers a lot of expense.