How does Lee propose we deal with gentrification? He’s not arguing that new arrivals should be respectful and assimilate, which is entirely reasonable. Clearly, moving into a new neighborhood and trying to alter its existing culture to suit yourself is a shitty thing to do. But Lee is arguing that they just Shouldn’t Be There, which is ultimately empty grandstanding and helps no one.
It’s an ugly argument, no matter who makes it — and it’s reminiscent of arguments the right has used for generations to stir up animosity toward immigrants, and that have been invoked by rich people who don’t want the poors moving into their neighborhood.