The fringe does not mean significant minority of people. I think you need to broaden your horizons if you think many people describe these characteristics as white supremacy.
Those at the top of the hierarchy -- people in positions of power and influence at Fortune 500 companies and venerable institutions -- are the same, either believing in these ideas, parroting them because they feel they have to, or using them as a cudgel to knock others down. Again, in a decade or two all of that will flow downstream.
Already, those who grew up in authoritarian countries and are now university professors are noticing how the adherence to the DEI party line is indistinguishable from adherence to the despot's party line 50 years ago; some true believers and many who mouth the words because they dare not.