Can anyone shed a truthful light on this?
In a nutshell, IMHO, European dislike/hatred of the Jews goes way, way back to ancient Romen times. And you don't erase 2000+ years of this in only 50 or so years (1945 - present) Most don't really know why they hate the Jews - or Catholics, or capitalists, or FreeMasons, or Americans, etc. - they just do.
Jews are hated by Muslims, which France has imported by the millions these past few decades. This crime was most likely perpetrated by French Arab Muslims.
Unfortunately, we're on the same track to ruin as France, with George Bush continuing his predecessor's habit of importing about 100,000 fresh new legal-immigrant muslims per year.