Amis on Islamism

Does this indicate a sea-change in British attitudes? Martin Amis has a lengthy and informative (as well as elegantly written) article on Islamism in the Guardian-affiliated Observer, no less. Quote:

It is painful to stop believing in the purity, and the sanity, of the underdog. It is painful to start believing in a cult of death, and in an enemy that wants its war to last for ever.

(He also deals in passing with mainstream Islam and religion in general, regarding which he has questionable opinions. But these are not the focus of the article.)