Here's my op-ed that uses long-term orientation, probabilistic thinking, numeracy, consider the alternative, reaching our actual goals, avoiding intuitive emotional reactions and attention bias, and other rationality techniques to suggest more rational responses to the Paris attacks and the ISIS threat. It's published in the Sunday edition of The Plain Dealer, a major newspaper (16th in the US). This is part of my broader project, Intentional Insights, of conveying rational thinking, including about politics, to a broad audience to raise the sanity waterline.
Why is "what ISIS wants" relevant here. ISIS is a bunch of fanatics who have a rather distorted model of reality. It may be that they want an increased commitment of troops because they believe it will lead to the prophesied climactic battle that ends with Allah destroying the unbelievers.
Why isn't it a relevant question to understand the motivations of your enemy? Unless you're saying that Da'esh has no motivation and is just doing things randomly.
It may be, sure, but it may also be that they want everyone to think that about them, in order to produce fear. Appearing totally crazy is often a good strategy in warfare.