So you are an expert on New Zealand citizens now too?
How do we even know how many people there own weapons like that? I'd venture to guess that it's an extremely low amount of people. Their population is only 5 million. Hunters don't generally use assault rifles, and people aren't stockpiling weapons for the invasion of the brown people there so, your argument sucks as much wind as Trumpty blows out of his pie hole.
Wisdom is learning from the mistakes of others.
Intelligence is learning from your own mistakes.
A fool learns neither from the mistakes of others, nor his own mistakes.