"Read Settlers" is a meme, but it's also a true meme. You should read it, or read other things about this thesis regarding the white working class in the US (I've heard other Marxists have since improved on Sakai's thesis but I don't know who they are).
White Americans are doubling down on the racism. As white settler colonialism is starting to face just a little bit of opposition (like teaching kids that maybe the US isn't a perfect, God-blessed country), they are losing their minds over the idea of losing even a tiny bit of their privileges. This is still a perfectly material explanation. White folks have enjoyed an incredible level of privilege since the beginning of this country and they will fight viciously to keep all of it.
IMO the bulk of white Americans are a lost cause. Not to say white folks can't be revolutionary (I'm white), but I think we probably should be spending our very limited time and resources on folks outside the imperial core break from western imperialism, and focus on the oppressed within the core. Any white Americans who want to join in are welcome but any concession to white supremacy is unacceptable.
Edit: to clarify, I'm not saying the Dems lost because racism or whatever. I don't care if the Dems win or lose, it doesn't matter. My point is much more about using electoral results and the campaigns that precede them to see where winds are blowing. It seems that "CRT" and fear-mongering about crime (and thus the need to fund even more cops) was a very effective message in appealing to large segments of the population - particularly the white population.
White supremacy is obviously a factor (always is), but we can't discount the influence of corporate news media just incessantly lying to people. As an example, with how hard they've been hammering the "we defunded the police and now crime exploded" lie into people's heads, it shouldn't be surprising that the anti-police bills (modest though they were) failed. And it all trickles down even to people who don't watch the news. The behemoth propaganda apparatus is by far one of the biggest obstacles to progress and consciousness raising.
People like to point to much broader social forces like settler colonialism and the labor aristocracy as explanations for problems of public opinion (and we should always be considering these things), but sometimes we should consider whether the immediate cause is something more simple. Like the people in the TV just lying 24/7. Listening to Citations Needed, it really astounds me just how many popularly held ideas are the product of, like, specific propaganda campaigns carried out in the 80s or whatever. Every other thing that maybe the highest arbiters of truth in our society have to say is some deliberate, malicious deception, which is obviously going to have an impact on what people believe.