Good for that guy. He was much more polite and professional than I would have been.
I think the social justice warrior phenomenon has gone on as long as it has because those people seem emotionally unstable, and when you see an outburst like this the first reaction of most people is to do nothing. It's exactly like watching a child having a melt down in a store. It's obnoxious and annoying and you just feel sorry for their parents.
I can barely even watch these videos. I think if this situation happened in my presence, I would just want to leave rather than speak up and get involved the way the other unnamed passenge did. Which is wrong of me.
Maybe we can't enlighten these people, but the next best thing might be to ridicule them to the point that they withdraw in shame.