I think you are right. Just an observation I would make is this. When you come to Hawaii as a tourist, you are largely ignored. Everyone understands tourism and most peoples' job depends on it in some way. So much is tolerated and it is a very welcoming place.
If you move to a "rich, haole" development like Princeville among other places you are not living in the real Hawaii. The history of Hawaii is that in the late 1800s, sugar was king and the sugar barons imported workers from Japan, the Phillipines, Puerto Rico, freed American slaves and others. They worked alongside Hawaiians and everyone was pretty much the same. So when you meet someone now their ethnicity hardly matters because everyone has the same basic cultural background as a plantation worker. The single exception is being a "haole" which literally means an outsider (possibly "without breath" which basically means having no soul) but generally is understood to mean a white person.
I'm a haole although I am respectful and have only been called haole in a derogatory sense once and it was after I did something stupid and deserved it. It was an eye-opener though because it made me realize how often people of other ethnicities who might do something stupid, are then singled out because of their race or whatever. Of course I knew that was wrong before but my experience really drove it home. But I digress.
I think the Hawaii that Lori (and maybe Chad) knows is not the real Hawaii where most of us residents live. I think you are right that they are sadly mistaken if they think this is a safe haven. Once they leave the tourist areas, locals are not going to put up with their crap. They are the very definition of "haoles" and they are going to find that out more as more as word spreads.
I would say that Hawaiians are nonviolent. That's essentially true. But historically Hawaiians had a very violent culture. Under the kapu system you would be killed for almost any minor offense, even things like stepping where the king did or women eating with men. Nowadays, yeah, it is all about "aloha." But part of aloha is extricating toxic elements in society and L&C certainly qualify.
If they went to Hana I think they will wake up to a very rude surprise within a couple of days. If they are in the tourist areas of Kaanapali it will take longer and they might be fine.