I notice this again and again, and often are growling at the crap driving before I even see what car it is, so it’s not some kind of prejudice.
My theory is that the car simply attracts holier-than-thou types who think they have even more an entitlement because they have a green car. It’s certainly not due to actual concern for the environment that the Prius has become a bestselling car in Japan, that’s for sure. It actually seems to be more some kind of showing off, though I can’t quite work out how or why.