Bill Punini Prescott says the old Hawaiian religion was abolished in 1819 by Kamehameha II.  He's right.  That was BEFORE the missionaries came in 1820.  The native leadership saw for themselves that their old religion was both false and harmful.  There was a short civil war where one high chief (Kekuaokalani) tried to keep the old religion but he and all his followers were killed in battle.  That was native Hawaiians exercising self-determinaton, freely choosing their future.  

Today a few diehard deadenders of the old religion want to revive it, not because they truly believe in the old gods, but merely as a tool to assert political power and demand money from us.  They commit violence by blocking roads, but claim to be nonviolent.  Hewa nui.  They can choose to be the human sacrifices their old religion demands.  Imua TMT.