The figure of 60% of jewish students attending private school is not reliable! The fact that there are no census statistics based on religion in France (French Law forbid it!), implies that samples used to make study on jewish population in France is framed through community bondage (synagogues, jewish school, jewish institutions as CRIJF..) As it is hard to know how much French Jews have a community bond....samples are highly biased as the conclusions you can draw with the sample study. However, the conclusions are surely representative of the French jews who belong to a community.
Top EU court strikes down data sharing agreement with U.S. (Reuters)
from the article: Redefining French Jewry