There was no shortage of radicals coming to Europe already. I think the lesson from all of our engagement and lack of it in the Middle East, and beyond, is you can’t not be engaged. It will come and kick you in the arse whether you like it or not. For all the problems our interventions might have caused, our attempts to disengage have caused as many if not more problems.

I suspect anyone who thinks our withdrawal from Afghanistan, and abandoning its people to their fate is the end of our problems in that direction is going to be sadly disappointed.