How far should France and the World go to repress the kind of terror we saw tonight? Would cutting off the head of ISIS, by destroying its territory utterly, help? Internally, how much civil liberty does one need to sacrifice?
Of course we don't know any details yet, but allowing ISIS to exist and occupy territory may not be an option the world can still afford. Destroying the so-called Caliphate may take boots on the ground, and once that is done, then what? Recent history is not encouraging.
What about purely internal measures? Again, the details of who the attackers were are crucial. The worst case might be that they were radicalized French citizens. Reputedly there are thousands of radicalized French Muslims already under surveillance. If the attackers are among them, or closely linked, mass roundups of suspicious characters might occur.
If French Muslims cannot manage to control their most radical elements, then they are likely to suffer a more general repression.