The prominence of whiteness has been wedded to Christianity from its beginnings, and it is extremely difficult to divorce the two, as there is much resistance from those in power to do so.
I still think whiteness is a 15-17th century invention but the thrust here is that whiteness is older. In the sense of heirarchal power connected to Christianity that is true. But then the center is hierarchy and power not race. Race is the tool of power and hierarchy not the center