Kimon it's not tribal because the inauguration doesn't match your requirements of the minimum amount of minorities or whatever cigarettegy stuff you come up with in your head. It's probably because Kanyes music is stuff and they don't have the heart to tell him
im saying it's entirely reasonable to suspect racism when an event dying for performers turns down a talented performer for not being "traditionally american" enough, especially when this was not a requirement beforehand. not to mention "traditional america" usually carries the connotation of a white-dominated society, so it's incredibly poor word choice at best.
another thing worth mentioning is if they were so focused on blasting only pro-america feel good songs then they probably wouldn't have played "Born in the USA" at his events. unless of course the people in charge of selecting music weren't self-aware enough to check the lyrics of the song before playing it.