The terror attack in Paris last week represents Islamism’s most explicit declaration of war on free society. Non-Muslims were slaughtered in a non-Muslim country to avenge a so-called crime against a blasphemy law that is not even Islamic — but merely Islamist. If there’s any blasphemy here, it’s that of Islamism itself against my religion, Islam. At last, on New Year’s Day, the president of Egypt, Abdel Fattah al-Sisi, did what no other leader of the Muslim world has done to date: he named Islam’s real enemy.

‘I shoot further than you, I am the biggest of the men!’ says John Sentamu, Archbishop of York. He is talking about the way politicians conduct themselves in the immigration debate. ‘We have got to be more grown up about it and not be like people who are screaming at each other across banks of a river,’ he says. ‘They mustn’t do what some people call male diplomacy which is always around the urinal… that kind of argument, it doesn’t work!’ Sentamu prefers a still small voice of calm from politicians, even if his own voice is booming and indomitable.

The targeted assassinations at Charlie Hebdo are triply repellent. Being planned, they are the product of considered decisions, not a moment of folly. Being aimed at journalists, they have deliberately chosen the vulnerable heart of the freedom that is fundamental to our values. Being gratuitously cruel in casually murdering an already wounded policeman, they display a chilling depravity. As such, attacks like this are intolerable: they must be stopped, and therefore they must be understood.