CEP Senior Advisor Ian Acheson writes: “Are we being ‘poisoned’ by extremism? The Prime Minister seems to think so. His speech on the steps of Downing Street following the Rochdale by-election described a country where values of tolerance and civility were being deliberately undermined by Islamists and the far right. ‘Islamist extremists and the far right feed off and embolden each other,’ he warned. But in conflating those two threats, the Prime Minister made the same mistake as his predecessors.”