I think your wife would feel just fine here, if she doesn't mind that it's just not as big as LA over here
For the most part, Asians are more of the majority here, and there's a pretty good amount of Koreans here as well - though probably not as much as LA Koreatown
There are Korean-style bbq plate lunch places like 7-elevens over here, and there are good Korean markets here as well - but the culture here is more influenced by the other cultures because it's such a melting pot (like Chili and Rice? That was a little shocking to me). I have to say that LA definitely has way more Korean influence than here.
I can't comment on the "anti-white racism" here because I'm Asian myself, but it's such a melting pot here, that as long as you're a nice person, people are pretty much accepting. I really can't say though, because others have had bad experiences.
Believe it or not, it's hard to find people who are true native Hawaiian here, and Hawaiian culture is really here for cultural preservation for the islands and for tourism- but you really don't see it much in practice in every day life - at least I don't see it as much.