Ok, I'd like to say my opinion on the matter. I do not know much about the topic, but this is my view. The hiring was due to Auburn ties, and it was not just because one man was white and the other was black. A lot of teams like to hire successful coordinators that they have had in the past. If you swap the color of both coaches, I think the result would be the same.
The WHY doesn't Auburn just come out and say, "we hired the someone familiar with our program...." yada, yada, yada? Sorry....this stinks of 'ole boy network' in a real bad way.