I think he is trying to say that he promotes individual rights, which is the antithesis of collectivism. Collectivism is about putting people into groups, and recognizing rights as being apart of that group. Rand said “Racism is the lowest, most crudely primitive form of collectivism. It is the notion of ascribing moral, social or political significance to a man’s genetic lineage . . . . Which means, in practice, that a man is to be judged not by his own character and actions, but by characteristics and actions of a collective of ancestors.”
That is what he means when he says libertarians can’t be racist.
That may be what he means, but that’s not what he said and frankly it’s an absurd arguement. Libertarians can clearly be racists. I think Paul is a racist, and he’s a libertarian. Whoever wrote the articles in question, if not Paul, is a racist, and likely a libertarian. He should have left that arguement alone.