Oakland is made up of 11% African Americans. The national average is 12%. Is below the national average considered diverse?
Pittsburgh is definitely not very diverse either. Segregated, yes. Not diverse. Frankly, we need to be concerned less with diversity and more concerned about eliminating segregation.
Again, what about typical college campuses?
Pittsburgh is without question more diverse than state college, Morgantown, Charlottesville, Madison....etc.