Sure, any country can go rogue and violate any treaty they want at any time. Of course, going rogue in that way will probably also incur economic sanctions. And that would devastate NZ. We'd witness NZ basically become the Cuba of the South Pacific.
I found him! Here's the guy posting all the lame JEW-HATRED memes.
Who knew it was just a guy who would say absolutely ANYTHING to make ANONS look bad.