That's life, folks. I agree w TubeG. How can you dig into the origins of the sound of jazz without dealing with racism (among other factors)? That would be the same as trying to understand the blues without dealing with racism. And what makes looking into the history of a music interesting is learning about the people and personalities that made it go. How could you possibly do this without dealing with racism? To leave that out would result in less understanding, more superficiality. It might still be entertaining, of course, but I don't fault Burns's approach here.