Adding here that in some Marxist analysis, racism is a form of classism, eg races are kept from moving into other classes via invented prejudices which divide the proles from focusing on the bourgeoisie. That is, racism is economic and power centred not aesthetic. So, when we say white people can’t experience racism, we mean that they are not kept from advancing in society/class because of their race, whereas non-white people are. This is a societal analysis, not an individual one which is the focus of a liberal definition.

Note also that the definition of “white” is fluid dependent on capital’s needs and demands.