I admittedly don't know too much about New Zealand politics, but this David Seymour guy doesn't sound like he should be taken seriously.
Lol, he's right. New Zealand is 17% Maori and 72% White. It's not a Polynesian country any more than Australia is, or Canada or the US are Native American countries. Should we rename France France-Faransa (Arabic name for France) because 13% of the population is Muslim? Hell, almost as many (15%) New Zealanders are Asian as Maori -- should we make Xīnxīlán (Mandarin) another official name for the country, for the purpose of representation? And even if it was a Polynesian country, why would that make a renaming the right thing to do?
I don’t think France was founded by a treaty between Arabs who already lived there and settlers from away.