“The relationship between Norway and Israel,” wrote Trond Ellingsen the other day at Document, Norway’s leading alternative news website, “is now at a historically low level.” We’ll get around to the reason in a minute, but first let’s just note that that’s saying a lot, given that antisemitism on a very profound level goes back a long way in the exquisite land of the fjords. The Norwegian Constitution, drafted in 1814, originally contained this sentence: “Jews are still excluded from admission to the kingdom.” Knut Hamsun, probably Norway’s most illustrious novelist, was a Nazi. During World War II, it...