In the wake of the massacre in Manchester, people rightly warn against blaming the entire Muslim community in Britain and the world. Certainly one of the aims of those who carry out such atrocities is to provoke the communal punishment of all Muslims, thereby alienating a portion of them who will then become open to recruitment by Isis and al-Qaeda clones. This approach of not blaming Muslims in general but targeting “radicalisation” or simply “evil” may appear sensible and moderate, but in practice it makes the motivation of the killers in Manchester or the Bataclan theatre in Paris in 2015...