Last week’s Islamist terror attack in Vienna has the doubtful doctor questioning the so-called experts of criminology and psychology who were yet again so easily duped.

But the early release of such as Kujtim Fejzulai has another deleterious effect, whose size or importance is impossible to estimate with certainty: namely, that it is yet further proof, at least to those already thinking along these lines, of decadence and weakness in the West, which is a rotten fruit whose tree only needs a bit of a shake for the fruit to fall. If a society is so sentimental about its enemies as it was in the case of Kujtim Fejzulai, what powers of resistance against determined attack could it have?