Neither does op.To be frank mate, I have adsolutely no clue about NASCAR or the folk that go. Do all people that go wave one... apart from the dukes of hazard IQ brigade is it relevant to the identity of the spectators? I haven't got a clue so I will defer on this point
Do all that go wave one ? No. You will see a few in the parking lot among the RV section that have more elaborate displays. You may see a few t-shirts or hats in the crowd but mainly it's garish t-shirts with favorite drivers on the apparel. You will see far more black faces than jonny tend. And this is not a recent thing, been this way for many years and neither just at yuppie tracks but the same at as hillbilly as it gets Martinsville.
People love to dream up things to support their biases but the reality is very different. I've been attending races for decades. Even seen blacks sporting the stars and bars. Truth is stranger than fiction sometimes