NZ flag debate from a British viewpoint

According to the author of this article in the Telegraph, "some jihadists show off a black flag inscribed with writing, such as the shahada, the Muslim declaration of belief. The contrary to that is as bad: the black flag of anarchism, which declares belief in nothing much. If it has father or mother it is probably the Jolly Roger skull and crossbones of the 18th-century pirates."

Yes, and you could add to that list the Nazi SS flag during WW2, but the central symbol - the silver fern - is the important factor, not the background colour, and this theme is already on NZ passports, quite attractively: