Deadicalization when in comes to racist beliefs does exist however it is slow and faulty at best. A mass reeducation is required and you'd need to judge the efficacy of the program while doing it and tweak it as needed when it comes to white Americans. Historically, I'd argue that there has been revolutionary potential in white Americans such as John Brown, Eugene V Debs, United Mine Workers and arguably the Young Patriots Organization. While parts of these organizations and people gave problematic aspects, there has been revolution potential in them. While the present material conditions demand racism and prevent mass revolutionary conscience for America as a whole, a change in material conditions could lead to white Americans becoming a revolutionary group as capitalism does not benefit them as much as socialism would.

I agree with you that most white Americans do not have revolutionary potential now; I disagree with you in that they could with a change in material conditions and that a minority do at present time.