I lived and worked in Maui and my wife can pass for polynesian (she's actually mixed SE Asian) and teaches Hula and Tahitian. She also owns a Hawaiian/SouthSeaIsland Boutique and is very involved in the Hawaiian community here on the mainland.
From our friends (all Hawaiian natives that have moved to the mainland) said the biggest problems are the schools. So if you have kids that should be your first consideration. Even the private schools have allot of problems.
As far as racism, I experienced it over there, but they considered me Hapa (half/mixed) and so they never really messed with me. The only time I got called a Haole was by another Haole actually and I'm pretty sure he was drunk as he was trying to fight me in the water, outside at Hookipa because he said I cut him off, when actually he cut me off. The funniest part was it was just me and him surfing..we had the whole frikin place to ourselves.
I also lived for a while on the North Shore Haleiwa and there you sometimes see homes where the Hawaiian flag is hung upside down.
There is also tension between the Japanese Hawaiians (nisei), Philipeanos, Tongans, Samoans etc.....
The economy is very tuff and unforgiving and there is allot of deep seated resentment. Being white over there, you are guilty (of being a racist, stuckup, whatever...) until you prove otherwise, so you really have to go out of your way and put up with allot before you finally get accepted as being genuine, and some people will just never like you.
The bottom line is, you respect the locals and they respect you. Often that means putting up with some stink eye and not looking back at them and being extra extra polite. Once you start acting superior...game over
Anyway I hate to generalize, and it's just my (one persons) experience over there. I love Hawaii, but even if I won the lottery would not raise my kids there. Great place to visit though!