Governments across Europe said they had bolstered security as Jewish groups warned that the surprise attacks by Hamas had led to a rise in antisemitic rhetoric online. In France, the interior minister, Gérald Darmanin, called on regional officials across the country to urgently put in place heightened security at synagogues and Jewish schools. “At a time when terrorist attacks from Gaza are hitting Israel, I ask you to immediately step up vigilance, security and protection of Jewish community sites in France,” he wrote in a message seen by AFP. Darmanin also called for the soldiers from France’s Opération Sentinelle, a...