When did Hawaii become so anti-gun? You must not follow politics. Hawaii is as blue as blue can be. Their state Senate and House are both 96% Democrat. There is no equivalent to that on the mainland.
There are no checks and balances when you have a Democrat autonomy that can vote in whatever they want completely unopposed and their Democrat governor can sign it. Hawaii can do whatever its politicians want and can trample guns rights in the snap of a finger.
In my opinion, there is only one thing between the current status and all Hawaiians having their guns seized with no guns allow on the island....it's called the Second Amendment. It's also my opinion that right is hanging by a slender thread.