I have been to Bonaire 8 times in the last 10 years. I have NEVER had any issues with theft. Don’t take anything of value and leave your vehicle unlocked when doing shore diving.
I have stayed at the Divi 7 times and it is nice if you are looking for a hotel. The last time we rented a house but still dove with Divi. The dive staff there is awesome. They have lockers on the dock and tanks readily available for shore diving there as well. The house reef is a very nice reef too. I’ve seen frogfish, spotted eagle rays and octos there.