Hey, I took a dig at the Maoris too!
The good "progressive" bishop is right, though, you know. If you're going to believe in a literal virgin birth, you have no valid excuse to de-literalize Genesis. And if yo de-literalize Genesis then you ought to think that billboard is funny as The Bad Place.
LOL! The plural for "Maori" is "Maori". And it is almost never preceded with the article "the", unless used as an adjective.
Hey, I took a dig at your point, too. And made about the same amount of sense as you did.
To the extent that Maori have religion these days, most would profess to be Christian of some stripe or another.
There is the Ratana Church, of course, and Ringatu -- those might be the ones you mean. There is also the Destiny Church, which is something of a more modern, evangelical phenomenon.