Spitting on my car: Who is doing it and why?

I know that it is obviouslly just some jerks that either don’t like European or are jealous, but it just fascinates me how it happens so often and multiple times a night. There are other nice cars that are parked downtown and mine is by far not the nicest. It’s clean, not ricer either, but its not baller or pimped out to draw all sorts of attention. Hell, I live on Forest Ave and always have drunks walking back to thier cars from Coles and Goodbar etc. Nothing ever happens there. IDK I guess I just have to start parking further away from the retard strip.