Been living among the locals for more than 35 years. Never a problem except with Japanese merchants when we first got to Kona. Kona had been invaded by druggy haole hippies and some were ripping off anything they could to survive. Take that back, did disappoint neighbors in Makaha when I first got to Hawaii
. Just couldn't party that hard and still fly an airplane for the Navy
There are pockets where endemic poverty has led to a resentment of anybody they perceive as better off than them. Typical welfare state mentality found in many US cities with a high concentration of multi generational government
dependency. There are also a small group of thieves who prey on tourist vehicles knowing it's unlikely anyone would come back to testify should they get caught.
For us, we've only locked our doors when we are going away for a week or more. Have never had an issue surfing possibly 'cause I don't. Surfers tend to get a bit territorial especially with someone who doesn't understand local etiquette and conditions and cuts off other surfers. Have heard some real horror stories of conflicts along the CA coast and almost anywhere the surfable waves are limited and the surfers aren't. Both our sons went to public school
and had no issues. They are Hapa so don't physically stand out. Both my wife and I are from the mainland and don't ever speak pidgin nor do our kids
Biggest racial issues are/were between newest wave of immigrants with local population.