Which 'Hawaiians'? This group most certainly does not represent the majority of Hawaiians, nobody has elected them. They don't even represent the majority of natives, since they are not organized in a simple hierarchical way (unlike continental Native American tribes). I predict that the case will be dismissed for the lack of standing, eventually.
So yeah, these 'prote$ter$' can go and fuck themselves with a genetically modified papaya.
I don't think that lack of hierarchical organisations should prevent native people from having a say in the way their land is used. Obviously consensus is important, but if they can agree through polling, meetings or some other means then that should be enough.