Yes, conservative Jews have always been a part of le Pen's National Front, would have to have been, if for no other reason, to avoid charges of anti-Semitism.
This would be the only hope for France, but no other nation has ever gone to 10% Muslim and been saved.
The mosques already outnumber the churches in southern France. You will see civil war in the next 10 years in France. The Muslims will be Jihading for an autonomous state in Southern France. Wherever and whenever they have the demographics dar al-Islam becomes realistic for them and then the host country has hell to pay for dancing with the devil.