I find it incredibly hard to take the OP seriously, to the point that I suspect he's another agent provocateur.
First of all, these events are statistically quite rare. That they happen at all is cause for serious concern and reform, but it oughtn't intimidate us from exercising our fundamental human rights. Free people ought not to be cowed, especially over relatively minor risks.
Furthermore, talk about hyperbole: what the decedent was doing clearly doesn't fit into the category of OC, at least as practiced as a normal routine by members of this forum etc.
Don't get me wrong: that's not to say his murder was justified. That a person doesn't consider at all times what actions might get him shot by police oughtn't to be a death sentence. The decedent committed no crime, nor any act of aggression. He was not given ample warning, and was gunned down before he had time to react. It was murder, murder, murder.
But the vast majority of handgun OCers do not do what the decedent was doing, and there is ample evidence to suggest that, as a practical matter (if not a moral one), that makes all the difference. The slew of negative police encounters reported on this very forum indicate that, while police may often harass, intimidate, and unlawfully arrest/prosecute law-abiding OCers, they do not tend to shoot them.
The problem with police excess is mitigated for those of us who go out of our way to behave in such a way as to avoid police reaction. The problem with police excess is that folks shouldn't have to behave in such a fashion to avoid death. Folks ought to be free to make the occasional less-than-perfect decision, or once in a while forget that there's a trigger-happy cop around every corner.
The inability or unwillingness of the OP to recognize this distinction seriously impugns his credibility.