Having never been a victim of a crime before (excluding having 'my' Nintendo stolen by thieves who also relieved my parents of other inconsequential items like jewelry and gold ingots) I tried out a few different reactions before settling on depression, which I often do.
I'm not really all that upset that the car is damaged, although it is turning into a pain trying to get it fixed and coordinating the repair with the insurance company. I am upset that someone can have so little regard for me (or anyone else, for that matter). I am upset that there are no consequences for whomever did this. I am upset that they suck so badly at what they do they weren't able to steal the car. I am upset the police function only as a means for generating a report number, and not as any sort of investigative or preventative unit, though I would concede they have bigger fish to fry. I am upset I didn't notice anything going on. I am upset there's nothing I can do about it, and little I can do to prevent it from happening again.
I didn't really experience the feeling that nearly everyone I speak with mentions - the feeling of 'violation' that someone was in your car/home whatever. I'm mostly just continuously angry off that something I spend a fair amount of time/money/effort on is so quickly reduced to a 3500 lb paperweight. And I realize that the car will be fine once I get it back (eventually) and there are much greater tragedies happening in a lot of places. But the theft/vandalism seems like an apt metaphor - some people just don't give a shit about you or the things you care about. And they'll resort to whatever means they can to profit from you. I guess I lost some of my naivety, and it's more of a shock than I would have guessed.