Best to talk about the dangers of “climate change”, as the Pope is doing this week, even as in the heart of Christendom the post-Christian future is showing up at the express check-in. For us 19th century imperialists a hundred years past our sell-by date, the migrant army indicts almost every contemporary western worldview: from Iraq and Afghanistan come the product of a decade of ineffectual desultory “nation-building”; from Libya of frivolous pointless interventionism, and from Syria of non-interventionism; and from everywhere else from across the map of the ruthless demographic logic of what happens when an impoverished dysfunctional tide of humanity next door to a depopulating not-so-gated community of soft decadent poseurs has sufficient access to “social media” to figure out whose system is easiest to game. The west’s cultural imperialism – the smart phones, the TV shows – do not spread western “values” but only western weakness: Look at how we live! And how close and undefended we are!

“I want to go to Germany”. If everyone goes to Germany, there will be no Germany to go to. But Angela Merkel has given a generation of young men from the Mahgreb to the Hindu Kush their battle cry. And the lesson of this month is that no one will stop them.

Oh, don’t get me wrong. There are real refugees in Europe, and there will be more: Ask a Jew in Toulouse, a gay in Amsterdam, an uncovered woman in Rosengard…