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There has been a huge social movement recently to "revert" to native symbolism.
Case in point: the name of mount McKinley in Alaska has been under fire for a while now and it was eventually changed a few years ago (semi-officially) back to the native name: Denali. (The current U.S. president is taking credit for the name change, however)
There is also movements to rename several areas in North America back to native names (although a great deal of current places have retained original place names or names of native leaders) as well as demanding recognition of the "mass genocide" (with constantly escelating numbers - last count was a ridiculous figure of 100 million)
So it's no surprise that New Zealand is suffering this same movement.