BS. Educate yourself. It's obviously doing the controversy bit quite well though.
While there is no one voice to definitively define what haka is, in a recent b95FM podcast kapa haka expert Paora Sharples explained that the very nature of haka is to be controversial so to deny or forbid that aspect of haka is to deny its true purpose....
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While haka indeed played a role in inter-tribal warfare, it was used for all occasions, and was incredibly important in the lives of tīpuna Māori (ancestors), he says.T his practice continues today, with haka performed at celebrations, commemorations, events of sadness, grief, anger or happiness or pride. Weddings, tangi, funerals, graduations, sporting achievements, protests, competitions, all have had haka dedicated to them by different whānau and rōpū.