Er... What was that again?

This via Instapundit: Arnold Kling says that...

We live in a "can-do" society. If a terrorist group arose from within Western culture, after one or two atrocities it would be strangled by a myriad of networks, community organizations, and political entities capable of enforcing group norms.

Oh, yeah? Remember the Weathermen? The Symbionese Liberation Army? Bader-Meinhof? My recollection is that the Egyptian government's response to the Muslim Brotherhood was at least as effective as the German government's response to Bader-Meinhof was.

Let's not go overboard reasoning by analogy here, but Kling's point is not obviously sensible.