"someone voting for the "least worst candidate" does not wholly endorse everything they stand for"
yes but somebody voting for the "most worst candidate" is not somebody who's values should be trusted
The very idea of “least worst” is very subjective. In their eyes, if they disagree with you, it is who’s values should not be trusted.
and if someone opposite the aisle from you believes the same thing about you, there's zero chance to flip them
with direct discussion about values, it's possible
basically all comes down to "are you open to the chance you're wrong"
you could view that chance as low as 0.001%, but it shouldn't be 0