In the usually bustling “Little Jerusalem” area of Sarcelles, north of Paris, the popular falafel and grill restaurant was eerily quiet. “People are not going out,” said Jérémy, the 33-year-old restaurant owner. Lunchtime and evening crowds are common in one of the largest Jewish communities on the Paris outskirts. But many thought it wiser to stay home, fearing a growing number of antisemitic incidents in France and across Europe since the Hamas attack on Israel on 7 October and the ensuing bombardment of Gaza. In France, home to Europe’s largest Jewish community, police recorded more than 320 physical acts of...