Yes, I have contrary thoughts.
I think that the French intelligence services have deeply penetrated the mosque and the cells, and that things are broken up, arrests and deportations made, etc., before any attacks come off.
I acknowledge that an attack could indeed happen, but I think that it is less likely in France.
Just think very carefully about what happened to those teenagers. They had committed no crime, and yet they chose to flee into live electricity and die rather than wait around for the police. Why?
One can never prove it, but I suspect that the answer is that Abu Graib was run by pantywaist milquetoasts. If you want to get information, you don't attach collars to the necks of Islamist males. You attack electrodes to their balls and you hit them with the juice until they talk or they cook. National security demands that these things NOT be revealed to the public, and so they will not be. If you know what I mean.
Also, the difference between Arabs and Islamists must be sorted out. 7-8% of the population of the Republic are of Arab extraction. That does not make them Muslims. Many are secular, or only about as Muslim as the francais de souche are Catholic. We do not speak here, then, of 5 million potential insurgents. No, the real numbers are in the hundreds of thousands.
You surveil. You infiltrate. You impede. You extract. And where necessary, you kill. And that stands a reasonably good chance, I believe, of preventing Madrid and London style attacks in France.