A white priest told me the same thing in my high school Social Justice class. This is based on an idea propagated by Foucault that the "powerless" are incapable of racism, as power is necessary for racism to be enforced in society.
Hey, Foucault would say anything. He was like the weather in Texas, wait five minutes and it will change. I think he once said that he would like his work to be viewed like a big toolbox where people could find anything they could use.