This is why I don't insure my personal property. The probability of theft * the amount of payout will unlikely exceed the cost of insurance.
Generally, unless you know more then the insurer about your risk factors, and can afford to eat the loss, you should be self-insuring your stuff.
My 'sue them' should have almost had a /s on it. It would be pointless suing someone with little or no assets. Its the only thing you can do, by yourself, within the courts as a private citizen.
You're also left pretty defeated with the lack of response from the police, then you have the beat down with the insurance company. Asking the individuals to go after a civil suit is just too much. Had I known about it, I might have done it. The police nor the insurance ever suggested this was possible. Even still, what are the odds of actually receiving any payment from a civil suit win?