If they prevent the rise of FN, they are setting themselves up for a bigger disaster.
If there is enough survival instinct left in the French populace, that would be a Storm the Bastille moment, but I wonder if the people would rise up. Most Western democracies seem to be doing the slide to collapse with populations that have been bred and educated to slit their own throats culturally.
The disaster has already occurred and the Ship of saints is landing daily.