It is a grave mistake to claim that military bases have been good for Hawai'i and therefore would be good for Jeju Island.
The U.S. invaded and occupied the sovereign country of Hawai'i in order to build a military outpost. This included the taking of more than 200,000 acres of land for military bases, training and other activities. The result has been the destruction of the environment with more than 900 military contamination sites identified by the Department of Defense. The military’s toxic cocktail includes PCB, perchloroethylene, jet fuel and diesel, mercury, lead, radioactive Cobalt 60, unexploded ordance, perchlorate, and depleted uranium.
When the U.S. took over, especially during WWII, the military seized thousands of acres of Hawaiian land. Whole communities were evicted, their homes, churches and buildings razed or bombed for target practice, their sacred sites destroyed by bombs or imprisoned behind barbed wire.
Notice that this analysis has absolutely zero attribution from John Hopkins University's US-Korea Institute.
But IF this story is true, please remember; the US gave the world a very nastily graphic lesson on what happens to a country which does not have a nuclear deterrent when it invaded and occupied Iraq.
As much as I loathe North Korean leadership for their incredible neglect and abuse of their people, I can certainly understand the logic behind this push to get into the nuclear arms club; if a country has a credible deterrent, no other country in their collective right mind will want to mess with them.