It's a dumb post for a few reasons. For one: go ahead and name an existing staff in a DI program that represents the type of diversity we're talking about here. They may exist, but they are few and far between, and they don't currently appear in the top 20 as far as I can tell. Which means: it's a lame jab at Iowa being racist when, in reality, it's a much more systemic issue in the sport and in the country. It's perhaps true that alumni tend to like 'insiders' more than 'outsiders', but in looking at this year's top 10 teams, only 3 have head coaches that came from the program. These are basic data points.
I'd add: I take exception at the idea that rural people are somehow more racist than non-rural. In my experience, some of the most open-minded people I've ever met are from the country; likewise, some of the most close-minded and openly racist are well-to-do people who live in (sub)urban areas. You make a fair point about 'dumb rednecks', but it applies to 'dumb white collar' people as well--the very people who, in many cases, have the economic means to shape program development.