Jews are among the least visible population groups in New Zealand. Anyone who wants to be anti-Semitic is up against it and will have to go out of their way to find like-minded individuals with whom to share their aberration.
This makes anti-Semitism ideal for the kind of alienated, powerless young men, full of anger and needing an outlet, who were in on the ground when the Nazi party was formed.
Many New Zealanders notice that we have a Jewish community only when, as happens periodically, some demented knuckle-draggers spray swastikas on Jewish headstones. It's an attempt to create a reaction and it works. The sight of a swastika can still shock when it is used to offend, which itself is a terrible testament to the power of Nazi imagery and its vicious legacy.
Perhaps those who attacked graves in the Symonds St cemetery and a house in Grey Lynn were just disaffected kids who couldn't express their anger any other way and "didn't know any better". Perhaps they think the Protocols of the Elders of Zion is a motorcycle club.
There is a prevalent feeling that the war is over, the Holocaust was 70 years ago and anti-Semitism can't be a problem these days. Non-Jewish people can be heard expressing, often with an air of fatigue, the view that Jews should get over their persecution "complex" because it all happened a long time ago and it's not happening now and general amnesia would be the best approach.