Nearly every country in Europe has memorials to the Holocaust; its history is frequently evoked, or alluded to, by politicians and intellectuals. But while it is often taken as a given that commemoration of, and education about, the Shoah can inoculate against anti-Semitism, the continent’s recent experience suggests otherwise, as the Economist columnist writing under the name Charlemagne writes. (Free registration required.)

“The only encouraging thing” about the deadly explosion in Beirut, wrote the former Swedish prime minister Carl Bildt on Twitter, “is that even Israel has been quick in offering humanitarian aid.” Had Bildt been better informed, he might have known that there is nothing new or unusual about the Jewish state offering humanitarian assistance to its Arab neighbors—or to more far-flung nations. Yet his bizarre comment was less hostile than the reactions of those who rushed to dismiss the offer as a meaningless public-relations stunt. Lahav Harkov writes: