The problem is that their game plan is likely to be something more or less along the lines of, "Start a war between Islam and the rest of the world. Since our religion basically teaches that we are inevitably going to conquer the world by force, we will be guaranteed victory in such a war."
The religion is false, so they would not win such a war. But it would be an extremely bad thing if it happened at all, regardless of whether they win. So playing into their hands is probably not a good idea anyway, even though they are wrong.
In which case they're going to keep making attacks so the solution is to destroy their ability to do so.
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.