The trouble with MMP is that some politicians view it as an opportunity to court support amongst people holding decidedly minority views. Media attention is beneficial no matter what kind when all you want is minority support. When your goal is just over 5% party support there are a lot of people you can annoy when campaigning.
The system of MMP Government relies on dealings between parties who are part of a coalition to be based on good will. You cannot tear up a coalition just because a member of a partner’s party is being a jerk. Even if they are confronted about being a jerk and then refer to those upset as belonging to Ngati Woke or claim that their clearly racist comments where they denigrate members of a different ethnicity are somehow not racist.
And claiming that their rights of freedom of speech are being attacked by people saying they should apologise is not an attack on freedom of speech, it is actually an exercise in counter speech.
The problem is that the coalition agreement expressly recognises the respective parties’ independent political identities. And base shtick is part of NZ First’s independent political identity.
If you want to do something about this make sure you do not vote for NZ First this coming election.