To refuse to set limits on dangerous people is not kindness, though it is often framed that way, but unkindness to the decent people who have to live near them. The City Journal article on the sidebar is a discussion about white flight from Chicago, with particular reference to the accusations of Michelle (Robinson) Obama, who grew up in a changing, white-flight neighborhood. She follows the stereotypical belief of what happened - which is not surprising, as most of us do that when we don't have time or inclination to study things further - but has its usual unfortunate, even terrifying consequences in the hands of the powerful.
Indeed, a further reason to doubt that white flight was simply, or even primarily, due to racial prejudice is that “black flight,” a more recent development, is following the same course. Examining a development “crushing South Shore and other once-stable neighborhoods on the city’s South and West Sides”—namely, the “exodus of middle-class African-American families seeking safe neighborhoods and job opportunities”—a 2017 Tribune article quoted Jennifer and Jason Parks, who once lived on the block where Michelle Robinson grew up. The Parks family’s enough-is-enough moment came in 2014, when a 20-year-old man was fatally shot on their street while walking his younger brother to school. “South Shore ranks sixth among the city’s 77 community areas for incidents where one or more people were killed over the past decade,” the Tribune reported.
Detroit neighborhoods are also mentioned, as well as the "urban cores" in general.