My wife and I are currently down here in Bonaire and wish we didn't have to report this but...our rental villa was robbed last night. We were out to dinner and drinks with a local dive guide and came home to find that some POS thief had run up from the shore between Andrea 1 and 2. He (they) came in through the back sliding door, ripped off all the alarm units off the walls cracked the "safe" and stole about $6000 worth of jewelry and cash. My wife had literally purchased a new diamond ring at 5:00PM and it was stolen by 9:00PM...
I am so sorry to hear about your losses and I can understand why you would hesitate to return. Bonaire is a special place but there are many lovely places in the world to go diving and I am sure you will find another favorite.
We love the Caymans, of course there is some crime but the crime rates are low on the Cayman islands, and that is just one of the many things we love about visiting. We prefer to do boat dives while on the sister islands but we mostly go shore diving and snorkeling on Grand Cayman. We never have to make sure that the car is unlocked with the windows rolled down, or be careful not to take any valuables with us. I'm not saying that it can't happen - and it probably does on occasion - but it's just not a big issue there and that's nice.
I also wonder if you were targeted, perhaps when you purchased the ring - by someone connected to the shop - or who saw you make the purchase. They would know that you would have valuable jewelry and probably other valuables in your villa.
My father was targeted in that manner many years ago (not while on vacation but in our local neighborhood). Some guys watched him make a large cash withdrawal at the bank and then followed him to the car and robbed him. Happily he handed over the money and wasn't injured.
Again, I am sorry to hear that this has happened to you. I have always hesitated to rent a house or villa or cottage for vacation no matter where we go. I see some lovely properties, often at good prices on VRBO, but they just seem isolated to me - even when they claim to have great security. When we are on Bonaire we usually go for a one-bedroom apartment on the second floor at Den Laman or someplace similar because it feels safer, but I may just be kidding myself. If they want to break-in the thieves will probably find a way to get inside.
I have to admit that we are getting older now and I am afraid that may mean that we are perceived as easy targets; that is one of the reasons we have hesitated to go back to Bonaire, although we love the island and its culture of diving freedom.
I am glad that no one was hurt and I hope that the happy memories of your trip will eventually overshadow this disappointment, inconvenience, and unpleasantness. Have a safe trip home.