this has nothing to do with gun culture. this is an example of idiots, people that believe they are above rules, politeness etc. Sure a gun was used, however there has been fights, knives etc. over just as stupid reasons. We need to look at culture. How many videos have there been blaming police when someone didn't follow rules? I has been rampant at Waffle houses where police were called, then they become the bad person for doing their job.
It is people not guns that are the problem.