The war is a net loser for him no matter what he does.
Possibly. I didn't say it's a wise move, just that it is a political one.
Going against lunacy and Nazi ideology might actually win him votes from sane people. It will cost him the votes of the pro IslamoNazis nutcases, but if he's seen as sane and calculated, it could win (back) votes of people that would rather not vote for Trump, but see Trump as the lesser of two evils.
If Biden (and his operators/team) CLEARLY distance themselves from the nutcases supporting the IslamoNazis.
I would guess that if Biden/Harris were replaced by Fetterman/Torres they might actually win in a landslide. (Or Kirby/Fetterman)