The Frenchies won't fight for Christianity or anything related; but they have no choice but to fight - as best they can - for secularism, and the Islamofascists frighten them as much as radical Protestants or Christians. Myself, I would absolutely oppose any American assistance to the French as they deal with their Muslim problem. I would certainly oppose ANY use of American troops on French soil, for ANY reason.
The French are on their own on this one (but are free to secure German or Russian allies, or whomever else). Even the French can't play the appeasement card because the cultural divide is so broad and stark. After all, who would sign the appeasement papers on the other side? Until the Frenchies can answer that question, they have to fight by default - all of their sensibilities to the contrary notwithstanding.
Paris suburbs may burn, but if these stunts turn into center-Paris areas around major monuments, then the merdre will hit the fan.
Mudslimes, whether French or not, are still just mudslimes.
It would be ironic if we freed Iraq and the French lost their own country to Islam...
If their metastasizing Mooseslimes don't frighten them a great deal more than 'Protestants or Christians' do, then they're truly many turnips short of a truckload.