Boomers are retarded and can only hate something if it's rhetorically attached to communism, therefore, whenever possible, call their unfaltering beliefs in racial equality programmed into them by the media and academia, "race communism". Even if this doesn't convince them to rethink their positions it will at least infuriate them by linking their views to communism and cause them to spiral and cry about the "evil Nazis", outing themselves as fake opposition in the process.
Gender equality was not originally envisioned by Marx, but racial equality absolutely yes. Marx was thinking of communism on a global scale.
More in general, communism is the revolt of the inferior against the superior. Race was going to be the main component of that, as historically in many countries the class divide has always had some overlap with the racial divide.