Not content with shattering the post-1945 international order, which delivered prosperity and power to his country for eight long decades, Donald Trump is seemingly set on destroying the US economy. And he’s doing it because he, and the American right, have lost their ability to grasp reality. Start with the economic vandalism, unfolding in real time and mesmerising to watch. For weeks, you could see the US stock market falling and falling until on Thursday the S&P index passed an unwanted milestone: it stood more than 10% down from the peak it had reached less than a month earlier, a…