On Tuesday, Dame Susan said "people who deny the Holocaust took place are many things, but most of all, they are liars".
She said Holocaust survivors living in New Zealand were some of the bravest people she had ever met.
"They've seen the very worst of humanity, they've looked evil in the eye and survived anyway. They embody the very best of humanity, they are true Kiwi battlers."
Dame Susan said racism against Jews is occurring in New Zealand, citing the example of a pre-schooler who had his yarmulke (skull cap) ripped from his head in Auckland a few years ago, while Jewish cemeteries are regularly vandalised.
"That this happens here makes me incredibly sad, angry and ashamed. "If we are to learn anything from the Holocaust it is that racism and hatred starts small. But we ignore it at our peril.
"All of us are responsible to ensure we live in a country where hate is never normalised. We can never let our country become one where racism goes unquestioned."
- NZN