If JD Vance’s thuggish speech last year to the Munich Security Conference directed at the solar plexus of Europe marked the moment when a transatlantic break up started, this weekend’s subsequent event, in a rainy and cold Bavaria, was where the debate about the terms of the divorce settlement got under way.Marco Rubio, the chosen Washington representative this year, is a diplomat, so he softened the Trumpian tone with references to German beer, the Beatles, Dante and the Mayflower. But his speech remained a stern warning that if Europe wanted to continue on its path of civilisational decline, as this…