[T]he escalation of the radicalization of Muslims in Europe, I think, has, in the past 2 or 3 years – and you know the incidents – the Nice truck bombing, the Berlin Christmas Fair bombing, those sorts of incidents, I think, have really worried Europeans... The thing I worry about in Europe is that there is a logic of escalation in some of this. That the people whose voices aren’t heard have to do things to make their voices heard. Do you know what I mean? They’ll have to, you know, like, demonstrate and that kind of thing... Europe can be the scene of world history even if it’s not the protagonist in world history, but it seems to show very little sign of being the protagonist.
Christopher Caldwell, interview with Bill Kristol (20 March 2017)