After deporting all its Jews to certain death and stealing all their property, these people continued managing the norwegian government, police force, etc.

This was common in the entirety of Europe with their mass amnesia, where everyone was in the resistance, and the actual perpetrators were the germans or the "nazis", never the local men on the ground.

Now it is not surprising when Europe who has collectively created the myth of "someone else responsibility" is now working on pinpointing the blame for genocide to the Jews themselves, creating the final work of scapegoating jews as was a cultural tradition in the continent.

So when Jews are massacred in the land they fled to after your own police force deported them to death camps, and your own government stole their properties making them refugees, why not go for the final stroke?