They are doing their job. If I were a cop, I'd be a jack@ss. Trying to deal with idiot teenagers who think that because mommy and daddy bought them an expensive car they have a license to behave like arrogant little sh!ts. I get my share of road rage, and I have been pulled over for "following too close" (no accident though), but I didn't take it out on the cop, he was doing his job and since I wasn't an @ss to him, he wasn't one to me. If the officer is rude to you, more than likely you have done something to deserve it.
Zenmervolt