Aaron Renn says that "progressive cities" like Portland, Seattle, Austin, Minneapolis, and Denver having less African Americans than the national average "raises troubling questions." James Joyner pounces:

“Diversity” is something that’s been advanced as a goal in recent years and which has in turn sparked a counter-diversity push by whites, like [Pat] Buchanan, who see it as a threat.  It’s a very odd thing in that there’s never been a more diverse culture anywhere.  Not only are we a giant melting pot drawn from all the world’s cultures even while our common core is Western European but we’re incredibly heterogeneous.  Life varies from city-to-city, state-to-state, and region-to-region.  And “diversity” means more than “percentage of poor blacks.”

So, it’s more than slightly odd for someone to argue for more diversity by arguing we ought all be more alike.