My point is simply that it works on a basis of vectors of transmission and vectors can be addressed. We must also agree that those friends and family got it from somewhere, right? It is not simply that the Johnsons have been passing down racism since their first patriarch, John, independently invented their specific instance of racism 3000 years ago, right? These things exist in environments where they are indeed transmitted useful idiot to useful idiot, but can only fester as they have because of interested parties inventing and perpetuating these ideas, deliberately creating environments in which they fester. Your racist uncle is going to appear as much more of a crank if he doesn't have white society echoing his words through insinuation at every moment.

It is difficult to legislate basic interpersonal relationships outside of the most extreme cases, but the overwhelming majority of how people are socialized (media, school, etc.) does fall under that purview and should be basically solvable, and at that point the racism of past generations won't matter all that much if their sentiments don't have soil that they are able to take root in because people have been overwhelmingly socialized away from it.