"What is this 'four gee dubya' nonsense you speak of???"
Lessons of the Past
The Laws of War
Firstly, your armed forces would be culled of Moslems, with those in it interned. While this was going on, the police would have the DNA of the attackers analyzed. While the analysis was taking place the now culled armed forced, not least to include the Gendarmerie, would be surrounding the banlieus that contain the most Moslems. It would be announced that any Moslem found outside his or her home after dark, or more than 400 meters from it during the day, would be subject to summary execution. As wire was emplaced around one banlieu, thereby freeing up some troops, others would be encircled. Their orders would be to shoot anyone trying to leave though anyone would be allowed to enter. Food and water would be shut off. Then one by one you would go through the banliues, taking samples from everyone. Anyone whose DNA indicated they were related the attackers, male or female, old or newborn babe, would be killed on the spot. Then you would burn the mosques. You might potentially not kill the genetically implicated on the spot, but herd them into the mosques before you burn them. If you could identify one banlieu, or perhaps two or three, from which the bulk of the attackers originated or which provided the most non-combatant support, you would turn it into a modern Lidice or Ourador sur Glane.
After that you would start processing the survivors for deportation, which deportation would be utterly pitiless, far worse than our “Trail of Tears,” and more like the Bataan Death March. Finally, assuming you were reasonably satisfied that ISIS / DAESH was behind this, you would use several of your not especially small number of nuclear weapons to destroy several of their strongholds and keep doing so until you ran out of nukes or targets.