The cities and colleges in the South are often more diverse than other areas, but I understand if he wants to stick to the NE or areas he’s comfortable with. https://www.usnews.com/best-colleges/rankings/national-universities/campus-ethnic-diversity
His stats would likely get him in VCU. It’s very diverse and urban as well, but it might be too big for him. Might be worth a look.
And many of us who have been in the South all our lives and our families for generations are progressive and welcome diversity, too, as did our parents and grandparents. And actually a lot of the Northerners who are relocating to my state are the conservative ones and they seem to be the ones leading the charge to dismantle protections we have in place to keep our school systems diverse and they want make it more “like it was back home” with “neighborhood schools” which results in “good” and “bad” schools. It’s a big problem that really galls me, but that’s off topic. And sure we do have plenty of conservatives, too, but don’t let your stereotypes about diversity get in the way of a great college.
Anyway, don’t write off the South or Midwest because you think it won’t be diverse. I’ll put Houston and Charlotte and Atlanta and Durham and Richmond right up there with anywhere for diversity. Feel free to write the South off because it’s too far from home or you don’t like the heat and humidity of the South or something, but diversity we got! Check this: Most & Least Diverse States in America