The most disquieting moment was his prolonged consideration of how easy it is to defeat the privileged middle-classes, using the fact that three plane-loads of people failed to overpower terrorists armed with nothing more than box cutters. It provoked a decidedly sombre air but the argument was also rather confusing. 'If we wouldn't be prepared to fly a plane into a building for our beliefs, they'll always win,' was the nub of it, which, as a call to action, seemed a bit drastic.