As I mentioned below, the "What would ISIS not want us to do?" is not a good heuristic, because by asking it you implicitly accept their world view.
For better or worse Gleb doesn't go into the ISIS worldview about the importance of Muslims immigrating to the caliphate and Western armies coming to fight ISIS in Dabiq.
But he nevertheless makes conclusions as if he has.
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.