I find that far more believable than a Bernie bro voting for Trump.
I don't. I was--am--a Sanders supporter, and I'm still pissed that twice the Democratic party has done everything it could to sink Sanders. I voted for Stein in 2016--in a state that easily went blue--because I honestly didn't think Trump could be as awful as he was. I figured he'd be run-of-the-mill Republican, rather than trying to go straight fascist. I figured, correctly that my vote would make very little difference in a state that is as reliably blue, albeit NIMBY, as it is.
I was, of course, entirely wrong about how awful Trump could be, and was.
In 2020 I voted for Biden, although I'm still pissed that yet again the DNC threw all their weight behind him, instead of the more principled candidate.
And I'll vote for him again, because any other vote is going to be hurting people that I care about. Even though Cornell West has, IMO, better principles than Biden, voting for West in a state that only went blue because the 'vote was rigged' last time would not be a good idea if I don't want to support a decent into fascism.