That’s a dangerous assumption in an election year where even if they do not vote R, they may not vote at all (this is a position voiced by many, and prevalent in pop culture) which could hand the election to “America’s Hitler”.
This year, criticism should be levied against both parties, and that’s not happening. Republicans in congress literally just applauded the genocide.
Next year, assuming Harris wins, continue to protest their position.
It’s always ‘do it our way this time because it’s the most important election of our lifetimes, and we can do it your way next time,’ next time never comes because they will always provide a big scary monster under the bed to keep you terrified. Keeping you terrified of what might happen prevents you from focusing on how shitty things are right now and fighting against it