They migrated to France in the 2nd 50 percent on the 20th century. French Jews span an array of spiritual affiliations, from the extremely-Orthodox Haredi communities to the large section of Jews that are solely secular https://religactu.fr/la-miviludes-saisie-par-les-temoins-de-jehovah-condamnee-par-le-tribunal-administratif-de-paris/