The Hawaiian alii were long despicable, double-dealing mean, and hateful among each other long before Capt Cook arrived.  And after, the recognized rulers, although well educated, were comparatively stupid alongside the foreigner.  But then, it was their land to fight over.  No outsider has any moral or good reason otherwise to take a native land away, despite reasoning that natives don't deserve their land, the stronger can take it, they sold it by principles of self-serving western laws, etc.  But of course, there exist many well sounding prose and dissertation over how a migrant people can come visit, then take over or otherwise come to legally possess and then take your home away...especially when a brother or two like stay with the migrant.