Since 2014, Western societies have questioned the roots of jihadism. How does the Left tackle these strictly religious aspects? Is it capable of understanding the mobilising power of transcendence and analyse the explosion of fundamentalism? And what if, faced with the West’s extreme tension over religious issues, certain European Muslims were minimising the strictly religious side of jihadism? Why is it when killers invoke Allah to spread terror in Brussels or Paris, the Belgian Left, the socialist French president and the representatives of the Muslim faith keep hammering in unison that these attacks have nothing to do with Islam?