The danger is that the stream of insults pouring off the Italian party leaders’ Facebook pages has not just political but also economic consequences, with Italy coming off worse. Trump can insult with impunity since he heads a superpower. Italy, by contrast, is less powerful, and an alliance with Viktor Orbán’s Hungary is hardly a sufficient shelter. Already some businesses that co-operate across the Franco-Italian border are feeling uneasy. Alitalia is hoping for French capital to save the airline. Infrastructure plans such as the Turin-Lyon high-speed rail link are in doubt. Italy, in recession and heading for only 0.2% growth this year, will need some allies in Europe and in Brussels. Its banking system remains undercapitalised. M5S is determined to show it is on the side of the people, and not the bankers, but translating that emotion into practical budgetary policy is proving difficult. Insults by contrast come easier, and cheaper.