In 1840, when the first official British presence touched down in New Zealand, it was led by a very idealistic young naval captain, Captain Hobson. And he gathered together representatives of most of the tribes in New Zealand. And at the Treaty of Waitangi he agreed that there should be certain rights that would be inherent within the Māori nation if they pledged allegiance to Queen Victoria.
To secularize the state is not simply a magical operation that happens at the wave of a hand. You’ve got to desacralize the state.