Why do you ask questions you already know the answer to?  

A brief history lesson and a basic understanding of justice should be enough to impress upon you the understanding that Native Hawaiians existed in these islands for millennia, their government was overthrow by white Americans and Europeans for the sole purpose of having the U.S. take the Islands by way of annexation - an illegal one according to U.S. law constitutional law... and it just so happens the author of this article is a U.S. constitutional law professor, so, you're barking up the wrong tree here.

A basic concept of justice should tell you that a wrong must be made right and a thorough understanding of law (and international legal principles) holds that there are no limitations in the delivery of justice to some wrongs (like an illegal annexation).

Native Hawaiians deserve reparations because, as a people, they suffer systemic oppression and trans-generational trauma stemming from the 1893 Overthrow.