Two of the dinner guests told me they have heard the term "Jew" being used by young Muslim men as a term of abuse. "It did not use to be like this," said one. "We were good at assimilating and were left alone by the [other] Norwegians."

The next day I met Cora Alexa Doving and Vibeke Moe from CHS, who were keen to assure me that there was no real recorded rise in anti-Semitism and that it was clear that radical Muslims were the main instigators. They told me the police are monitoring approximately 100 such radicals, all of whom have criminal records and/or connections with jihadist groups. 

Anti-Semitic hate crimes are not recorded as such since the category does not exist in Norwegian law. However, under pressure from the Jewish community to take note of specific reports, the police recently stated that there was an increase in reports of hate crime towards Jews. 

 "It is a little bit tricky that the Norwegians say that Jews should take a stand against Israel," says Moe, "and that so many compare what is happening in Israel with the Nazi regime. But maybe they have a lack of knowledge about the situation in Israel, and ‘Nazi' is used casually to describe something bad."

For Norwegian Jews to be told they are responsible for the Middle East crisis, or that they should "take a stand" against Israel is analogous to telling all British Muslims that they are to blame for the Asian sex-grooming gangs.

I left Oslo with a sense of foreboding. This tiny Jewish community, despite its tenacious spirit that survived Nazi occupation, could well become extinct in a country that prides itself on being a liberal and tolerant nation.

No one, it seems, is protecting them. More than 60 years after the wartime collaborationist leader Vidkun Quisling was executed, the word "quisling" remains a synonym for traitor. If the Jews were now to be forced out of Norway altogether, future generations of Norwegians will be left with an equally shameful legacy.