This discussion just goes to show how 3 different people interpret one situation. To me, this woman was just a bitch whose indignation was feeding upon itself. I wouldn't be surprised if she reacted the same if a white guy had done something to irritate her. I think she'd be just as inclined to call him a "dumb polack" or if his appearance warranted it, a "skin-head Nazi". She may have even called him a stupid "wop" had he been an Italian. She's an insensitive name-caller. Mexicans and Asians probably inspire ethnic lables in her private conversations, too. Or would I be surprised if she met a black guy who she didn't find offensive that she would be congenial toward him. I know her type. This is the way of the world. We tolerate those who don't ruffle our feathers, and go off on those who do. Some of us are more volatile and demonstrative than others. Bottom line is that we are a population of people whose prejudices lurk just beneath the surface of our facades, and black people are not excluded from this shortcoming. Polite society is a screen we hide behind.
I also don't think this motor mouth was mentally disturbed or has a low IQ. She's just an average person; and nowadays being average includes being bigoted. And, of course, she resorted to what everybody else currently does when they get exposed or accused. They either play the molested-as-a-child card or the bi-polar one.
As for the guy recording her, the idea of taking the higher ground and passing up a chance to embarrass an antagonist is unrealistic. People act in the moment and don't take the time to intellectualize the situation and make a value judgment. The temptation to record bizarre behavior is fueled by a human fascination with what is shocking or lewd.
And what is the moral of this modern day Aesop fable? That one picture is not worth a thousand words. What we see is influenced by how we approach life. Furthermore if who we see doesn't look like us, preconceived notions come into play.