But we won't, as a society, devote the same brain space, or parliamentary time, or column inches to wondering why there's a rise in the white far right, as we do with wondering how to solve the problem of Islamic extremism.
Really? The rise of the far right has been the subject of more column inches than almost anything else in politics for the last 20 years. I've read hundreds of articles tracing it in Britain through the BNP to the EDL and onwards, in Europe with the awful Le Pens, and in Germany with Pegida. Obviously a lot of the focus in the last year has moved to the US, although that analysis has tended to shine a light on the growing prevalence of far-right extremism in plain view on the internet.
It probably hasn't to this point had the parliamentary attention to match, partly because there has been a dangerous thread in the Tory party who thought they could harness the anger to their own ends. Hopefully that is starting to change.