Isn't that the same point that Kuipers talks about with:

> However, violent actions taken in the name of defense against terrorism are very likely to increase the likelihood and magnitude of future terrorist attacks. We need a combination of short-term vigilance and protection, and long-term efforts to reduce the problems that breed terrorism, both in non-violent ways.

Saying that negotiation with terrorists is a lost cause is true to an extent, but Kuipers doesn't advocate standing back and doing nothing at all. Acting overtly hawkish doesn't help anyone either.