At some point soon you might hope our country would wake up and realise the world is no longer in a prelapsarian state and that there are foreigners out there intent on causing us mischief. For 30 years or so we seem to have been possessed by the belief that, maniacal jihadis aside, the world is full of decent, upstanding people, and that we should swing, swing together with our bodies between our knees, as the Eton Boating Song has it. Few countries bought into the benignly stupid shibboleths of globalisation with quite such commitment as the UK. One supposes…