(4) Why does anyone produce racist images in consumer media messages? The answer to that is simple: they’re paid to do so. Now, the workers who create racist messages might or might not “believe in” the messages, but from the standpoint of capitalist production, their belief is not relevant. Only the valorization of capital advanced by the capitalist in the form of profit is relevant. From the standpoint of the capitalist, the content of the message is irrelevant as long as it is saleable and profitable. Those messages that generate more profit will be reproduced again and again as long as they are profitable. Whether this produces or reproduces a culture that suffers violence, hatred, fear, and dysfunction is also not relevant to the capitalist, except in so far as those sufferings can be treated as needs for which consumer objects can be produced for a profit.
It is important to emphasize that this does not explain the origin of racism (or of language). But I’m not sure discovering the origin of racism is important for dealing with racism. I am sure that dealing with racism will require dealing with profiteering from it.