There are actually no indigenous people on Hawaii.
Etymology:
Indigenous is derived from the Latin word indigena, meaning "sprung from the land, native".
Hawaii was settled 800 years ago by Polynesians who sailed from the Society Islands.
800 years - that's practically yesterday! Before that, there was no-one there (that we know about).
Are we supposed to believe that before the Polynesians arrived, the Gods and spirits had been sitting on top of Maunakea for billions of years, waiting for someone to come and worship them? Or is it entirely more likely that this nonsense is entirely made up?
Also, the astronomy hub on Hawaiian volcano is in no way 'controversial'. It is entirely normal and right and proper for an astronomical observatory to be on top of a mountain - it's the beliefs of the locals that are controversial, as they have no basis in fact and may be safely disregarded.