Both sides should have known better.
The 68 year old thought because she was an adult they'd treat her with respect (or maybe because she was white or old or whatever). She's obviously not all there because if she knew the cops were coming she should have waited instead of getting involved.
The kids were unsupervised. They were out of control, their age is the issue not their color. Every generation seems to be less respectful of the elderly/authorities/other people.
The dude that dumped this old lady did it because he knew he'd always be remembered by his peers. He embarrassed himself when he dropped her, and he decided to save himself from further embarassmnet when he dragged her to the pool.
It was sad to see.
But not as sad as the cowardly neighbors who feared retaliation by having their face blocked from tv...