Racism is prejudice based on race. The addition of a power structure was added to make racism against Whites more palatable. It’s a mix of denial and rationalization. And it’s racist as hell.

Edit: I assume you also think it’s impossible to be sexist against men? Or heterophobic against straight people? All this is is an attempt to whitewash racism against people who look like the people doing the oppressing. It’s a generalization based on race, which is—by definition—racist. Why not direct your anger at the incredibly tiny group of people actually creating the power structures of the world, rather than funneling it into useless and hypocritical counter-racism?