I live near DC. Gentrification in the city is almost always wealthy whites displacing poor blacks. There is very much an us-vs-them feeling among those that are being displaced.
One ridiculous effect of the gentrification... Historically black churches in the downtown areas now have congregations that have been displaced and commute from the suburbs to attend services. This causes all sorts of problems with parking that didn't exist when the congregation lived in the neighborhood.
This in turn causes conflict with new residents, who want to add bike lanes. The congregation doesn't like that because it would reduce on-street parking.