I'm still in the middle of the book, but I think what they are saying is that, we've come to believe race is real, because of what they call racecraft, makes it seem real, that its a conjure game without a conjurer, a bunch of interviews with them, the Fields sisters, are on Jacobin if you want to check it out. They go a bit further than saying race is a "social construct" If I'm understanding what they are saying correctly, a would be racist looks at someone's skin and other attributes, makes a decision about one's ancestry (which it and of itself has a bunch of associations) and then practice a double standard based on that, and that many of us are doing this, reproducing this, kinda all the time, so much so that we are living in a collective conjure (hence the use of the metaphor of witchcraft) They tease out differences between bigotry and attitutdes and racism (which they see as acts/practices) They seem to disagree that internal sense of identity either as white or something else or as a racist has all to do with the practice of racism and they give a bunch of examples. I'm not an expert on what they call Racecraft, but its a pretty compelling argument when you are inside of it. They talk a LOT about political economy as well...to think through inequality as they are marxists. Its a framework that helps understand how people come in and out of being the victims of racism, depending on time, location etc. My southern Italian ancestors are good case study, at one point they were perceived as not white, something other and experienced racism, then that shifted over time between the 1920s and 1960s, it still happens to some of us, depending on how we appear. Jews are another example...