The only thing I will say for “blue no matter who” is that the alternative - threatening to withold your vote - only works if the campaign is aftaid of losing. They aren’t. They clearly don’t care. They don’t want to govern, they want to present only a token resistance to encroaching fascism and corporate domination.
The benefit of voting the nominally-left-of-extreme-right party in is that it forces them to disappoint their base and that radicalises those people against US empire. Letting Trump win won’t accelerate that process, it will just force people to radicalise in an atmosphere of extreme oppression.