The mainstream needs to start publicly refuting any idea that race exists. It's the only way.
I used to think racists were people who practised racial discrimination, but now I realise racists are actually people who believe in race.
The argument has been clearly made since the 1920s by Franz Boas, and it's only a small group of well funded racists who have perpetuated and promulgated the myth.
It needs dealing with head on, but seems a conversation US culture is unable to sustain.