ALL OF THE ABOVE:
Let's be honest here (I know I KNOW, that can't happen when people debate politics), but there were legitimate grievances why white voters moved to the GOP.
Jobs moving overseas, was a BIG factor. They also felt betrayed by Wall Street. They really DID believe Trump would drain the swamp.
BUT.... if we were to be honest (and again, partisan hats will be put on and no one WILL BE honest, just partisan), white supremacists groups grew in number and size after the election of Obama (look it up, it was a fact)
It has gotten so bad one person I debated with here called Obama "Hussein" Obama with quotation marks, a clearly anti-Muslim trope, but he said "oh come on, Hussein is his middle name. I WILL LET ALL OF YOU decide if that is a valid excuse, but those of us who aren't alt-right recognize it for what it is.
IF we were to be honest, whites saw their neighbors, their workplaces, their hangouts (bars or coffee shops) showing more black faces, more Asian faces, more Hispanic faces, more Gay faces, and fear took over.
ODD THEN that suburban white voters turned against Trump this time around, so why? Eventually (unless you live in a bubble) you will know someone who has a gay son or daughter, you will end up working beside a black man or woman, or a Muslim, and suddenly discover, they aren't demons.
Coal jobs didn't come back, Mexico didn't pay for the wall, so Trump pulled your chains and you let him.
AND YES, the rise of rightwing media, with the likes of Hannity et al, did persuade many white Americans that there was going to be an invasion of illegals, people of color, people from the LGBTQ community into your neighborhood, and OH THE HORROR!!
Odd then that the same people who fell for the angst created by rightwing media decided ALL OTHER media was bias and fake.
I grew up with German parents who claimed they were NOT racist but told me as a kid with a straight face that you just don't invite a black man into your home, that isn't racist, that is just the way it is.
I rebelled against that thinking.
I have broken bread with Conservatives (here in Canada) Liberals, Muslims, and have known gay people. I never had an issue with any of them.
IF YOU DO - then look in the mirror and ask yourself, why? you get ONE life to live, think about it! DO YOU want to live that ONE life being angry, being afraid, being paranoid, being part of a GOP that now has conspiracy theorists like Marjorie Taylor Greene in their ranks? OR do you want to get along with people and JUST LIVE YOUR LIFE?
Socialists aren't coming for you. Illegals are a concern, but they aren't monsters, TALK TO ONE, and you will find out. Muslims aren't all terrorists, and gay people are people.
AND unfortunately, this question posed about WHITE PEOPLE was unfair too, Biden could not have won if white voters hadn't voted for him, so better question would have been, why SOME white people still vote GOP.
SOME for legitimate reasons, family values and conservation ideals.
BUT some for bigotry and fear as well.
Recognize the difference, it will make you a better person.