I think Trump’s soundbite politics has been excellent at keeping ‘single issue voters’ onside - he throws out a statement that he knows will appease or please a specific group, who then ignore everything else that he says because ‘he’s said x, so that means he’s on my side’.
Foreign policy is not something that bothers many American single issue voters, so he can and he will wreak as much havoc as he likes in that arena as long as he dresses it up domestically as ‘saving money for the American people’ or ‘bringing our boys home’ or ‘being a strong leader’.
The only hope is that Americans will both feel the negative impact of his actions AND link it to him directly AND do not excuse him on the grounds that he says the right things about their own ‘single issue’. Tbh, that combination feels too subtle and nuanced to be likely to come about.
We have no leg to stand on here - an electorate that supported Johnson and now support Farage, deriding Starmer because he promises no easy solutions and tries to act rather than just speak have no credibility when criticising another electorate for choosing a venal, self-interested, soundbite-issuing leader.