We do indeed. The one type of privilege argument is where things stop - and you're absolutely right with a very specific example about your retail experience. It's bang on. I think the issue is what happens next and the macro-level picture.

The white working class are a huge group in the US - they are, for want of a better explanation race privileged but economically disadvantaged. They likely haven't thought through their race privilege or don't care about it. They care about other things like business in their local area or the crime rate, or wage stagnation. The middle class of all skin colours care a lot - but they predominantly lecutre each other. Their aren't enough of them to keep the dems in power, particularly if identity politics continues to get more and more divisive.

It will take a demagogue only marginally brighter than Trump to shift a significant percentage of voters over to their view of the world. And you're right, it'll be for two reasons. It'll be because those white working class voters failed to recognise their race privilege, but also the metropolitian intolerant liberal also failed to consider their own. If it happens- and I hope it doesn't, it may devolve into a race war.