The commotion around the checkout lines is something to be expected in a busy store. I don't know why the man went from zero to angry so quickly and why he insulted the worker with a slur. Aside from thinking "What the hell is going on here?" and "What's wrong with this man?" I also wondered if this was a preview of more vulgar behavior to come. I've written about vulgarity before. I don't think I'm making selective observations. I think there's some truth to saying we live in a vulgar society. I also wonder if the era we're heading toward is one of "I can say whatever I want to say." Maybe this is backlash against political correctness. We've all heard people gripe about political correctness. While a portion of society will continue to be careful and deliberate with their language, it could be that others will go the route of saying anything they want at any volume they desire.
Many times I have seen people disrespect workers. I didn't view this episode as merely a matter of a customer being mean (and sexist) to a worker. It looked like an angry man who cared not for societal norms that call for civil behavior and measured language. I don't know what's going on. Maybe we're increasingly a society of people playing by different rules.