"There's no racism in New Zealand, that would never happen here," is exactly the sort of belief that will let it happen here. Please remember, the very fact that YOU haven't seen it is a sign of the privilege you have because you've never been forced to live with it. Plenty of us have. Believe us. Listen. Notice. Say NO.
You don't have to have experienced bigotry for it to be real. You don't have to have been a woman paid less than her male colleagues with fewer qualifications and less ability to know that equality is important and takes nothing away from you. You don't have to have an LGBTQ family member to want everyone to have a chance to live and love the way they want to. You don't have to have someone you love be told that he should go back home to know that everyone deserves to live without being abused for their skin color. You don't have to have had someone point at your precious grandson and ask "what's the matter with IT?" or write to you specifically to tell you they won't donate to his fundraiser because he's Asian to feel your heart break on his behalf. You shouldn't have to watch your child dragged to a prison camp to know condemning someone for who they are, where they were born, or what they believe is as wrong now as it was during WW2.
It shouldn't have to happen to you or someone you love for you to know it's wrong. It shouldn't! And it shouldn't be true that despite my lack of a huge platform, I've got a better chance of having my words listened to, not because I said them better than anyone else, but because I'm white and we're the ones who get listened to. Even though some of us don't even believe racism is a "thing" worthy of our attention or concern.
Just because you're not waving torches and carrying swastika flags at a rally doesn't mean you don't have a part to play in enabling people who do, or a responsibility to condemn it.
Stop ignoring it. Stop thinking the only experience in the world is the one you've lived.
Wake up and say NO, or one day (probably soon) it'll be you shaking your head and saying, "I never thought it could happen here."