There is both little and an endless amount to say about Jostein Gaarder's op-ed piece in Aftenposten yesterday (translated by me, here). But it boils down to this: it promotes antisemitism of the type that was universal in Europe until the 19th century (when "race theories" became the pretext). The fact that Aftenposten even printed it speaks volumes about the toxic atmosphere in Norway. That other prominent Norwegians support it, whether tacitly or explicitly, says just how socially acceptable antisemitism is in Norway. Whether or not the bigots know or care to admit that they're being antisemitic.
There are about 1500 Jews in Norway today. I'd have to say that the future for them is becoming increasingly uncertain. Not because pogroms are going to break out, or the government is likely to pass discriminatory legislation. But because popular opinion makes it increasingly difficult for Norwegian Jews to openly identify themselves as Jews. Jewish community leaders now advise their members to not wear a kippah in public, Israelis and other Hebrew speakers are advised not to speak Hebrew so others can hear it. The synagogue in Oslo is probably one of the most intensely protected buildings in Norway.
Gaarder's op-ed is a new line in the sand. If the Norwegian cultural and political elite allow it to stand, they are complicit in condoning the reintroduction of antisemitism in Norwegian life. A trend that is already well underway, thanks to rampant new antisemitism.
It is hard to see how this trend can be reversed - the press has for so long poisoned Norwegian popular opinion that antipathy to Israel is accepted as conventional wisdom. As the press (everywhere) generally tends to change the subject rather than admit they're wrong, don't expect any backtracking there.
In short, it's going to take a disaster of monumental proportions, and then decades of lingering introspection, before someone says "hey, we contributed to this."
It seems to me that what probably will happen is that Jews leave Norway for Israel, as they've already started to do. In 10-20 years, Norway (and many other European countries) will wonder why there are no Jews left there.