I lived in PGH for 5 years and, unfortunately, I think he's right that there is a huge amount of racism in the area. It definitely wasn't most people I knew, but among people that grew up in the area it's definitely a thing.
Pittsburgh is one of the least diverse metro areas in the country (http://www.post-gazette.com/business/career-workplace/2015/0...) and it really is eye opening how segregated the city is when you live anywhere else. I discussed this with most transplants I knew there and they agreed. I think the effect of this was pretty apparent for my entire time there.
This makes me super sad, because I absolutely love PGH and am a huge booster of it. The lack of diversity was far and away the biggest draw back of living there for me.