The video clips are disturbing. They show a massive brawl involving scores of teenagers at Atlantic Station on Saturday night. Some are running, some yelling, some throwing punches. At the end, one youth collapses, having been pummeled. After a few kicks to the head, he starts to quake. “I am in tears. Dear Lord, help us. I pray he is okay,” Atlanta City Council President Felicia Moore said Monday in a social media post, nearly 48 hours after yet another incident outside a local shopping facility. It’s not solely the harrowing footage that some find disquieting. It’s not only the...