Framing racism in purely biological terms misses the historic component: lived reality in capitalism makes people alienated, destroys solidarity and communal structure and instills the feeling, that life is a zero sum game, where someone has to lose for you to win. Racists are suffering from economic contradictions and make the conscious choice to not turn against those powerful people and structures responsible. They feel too weak for that. In a deplorable step, for which they are fully accountable, they rather go after those most marked as targets by the very powers that oppress them too. To this end and insulting their own intellect, they readily accept the most obvious lies and propaganda.

In a communist societies, communal structure would exist, where people encounter each other, experience true solidarity and feel powerful to confront any injustice (because they would be). Solidarity, empathy and working together in groups is far more fundamental to human nature than ingroup/outgroup thinking. It's the historically contingent economic structure around us that severely punishes and criminalizes the former, while strongly pushing the latter.