The ideals are so unworkable within the structure of New Zealand's culture, the group can't really grow, or even survive. They are vaguely threatening in safer environments (for them), such as Christchurch, when every so often an Asian student gets pushed into the Avon River. But generally, it's pathetic.
But a newspaper gives coverage to the Mongrel Mob, or Black Power, or other gangs, all the time, because they commit criminal acts. Crimes are of public interest.
It seems to me, the concept of gangs such as Mongrel Mob, Black Power and the like, are considered acceptable to New Zealand society, even though their members end up in court again and again.
Yet we foam at the mouth at the ideals of a tiny club of white supremacists who keep their heads down and barely have the where-with-all to contemplate any kind of crime?
It's because they're an obvious target of absolute unacceptability - which helps us ignore what we should really be saying no to.