I'm sorry. I tried hard but I cannot make sense of a single point you made in that post.
The Remainer point seems to have constructed some sort of straw man grouping everyone who is against Brexit into one convenient bag of "yes, but".
The Trump point fails to account for that man just saying shit. He will never acknowledge he has made a mistake, and his supporters will swallow everything he says even when it is directly affecting them adversely in a day-to-day way. You say that tariffs will harm America, he will say they Made America Great Again and there will be a landslide in the next election (assuming we have one) despite rampant economy woes.