You know what I love about your post, Lazs, is how selective you are with blame. If someone vandalizes a Jesus fish, they're obviously a religion hater. If someone vandalizes a Darwin fish, then they're probably just some run of the mill vandal that would have vandalized anything.
They pulled off the plastic darwin fish, broke it in half, then punched in the driver window and placed the broken darwin fish on the seat.
If you really think there's any big mystery about the motives of the person who did this, then... well, I think you're a bit silly.