Hawaii is not just an island that nature created. The order actually had this place built from scratch in the early 1800's. The reason why it was created was to serve as an offshore base for all kinds of activities for the order. We had thousands of people who worked at the Island but then it started to become apparent that people had started leaking information about the projects that took place there and we had to shut down.
We then proceeded to populate the island with the people that are now called natives of Hawaii and we did this because we knew it was essential for the perfect cover up of what occurred there in earlier decades. The order had to move a lot of important prototypes to other undisclosed locations. The underground labs remain there but they are completely shut down and impossible to find.