I really don't know. But I suspect it might be folks just getting tired of being told what is best for them by others. They want to decide for themselves.
And so they decided(all by themselves) that re-electing Donald Trump was best for them...?
Hard to fathom. Were they afraid of the vaccination and wanted it stopped? Were they against wearing masks? Against the shutdown when Blacks were dropping like flies? Were they just tied up in white identity politics and resentful of Democrats trying to hrlp Blacks to the exclusion of white people?
Was it the talk of defunding the police? A slogan coined by a Black extremist to save Black lives? Socialism maybe? Against the Black Lives Matter movement? Antifa?
Or were they mis-lead by Trump's lies...? He lobbied hard for Black votes.