There is a legal case between the two greatest minds of the Australian senate ( sarc). During the case it was stated you could not make a racist comment on a white person because of the power imbalance.
Holy Derrider bollocks batman.
Racism is making a derogatory comment about a person and linking it to the persons skin colour. You allege the person is stupid, smelly, immoral etc because of their skin colour. Thus saying blacks have lower intelligence than others is a racist statement because you are asserting it is because they are black.
Saying someone is a black bastard is NOT racist as black here is merely an adjective. you are not alleging the person is a bastard because they are black.
got it. Good.