Jürgen Habermas, hitherto a prominent critic of the Bonn authorities, warned Dutschke and his friends a few days later of the risk of playing with fire. ‘Left Fascism’, he reminded the SDS leader, is as lethal as the right-wing kind. Those who talked loosely of the ‘hidden violence’ and ‘repressive tolerance’ of the peaceful Bonn regime—and who set out deliberately to provoke the authorities into repression by voluntaristic