Do you know and understand the difference between a law and a statute?
Blah, Blah, Blah....The question is if someone is driving in a manner that is unsafe to others or infringing on somebody elses rights. Other than that there is no 'law' regarding driving. the rest is statutory and doesn't really carry much weight unless you want to hand over your cash to the govt.
I have many times refused to follow directions of the police in defense of my rights. Now I don't yell and scream at them, I am polite and calm, but I always force them to 1)prove they are actually police and on duty by showing me correct ID and 2) making them cite chapter and verse of the exact law they are trying to use against me. If they do not do both of these things you are not bound to comply with anything they say. I have actually called 911 from my car and said I may have a police impersonator at my car window because an officer refused to show me picture ID. It was quite pleasant to watch his supervisor tear him a new one for not doing it.
Blind obedience is not in our best interest. Know exactly what your rights and their obligations are and you become quite powerful against most minor violations.
Well all the blather above aside. He threatened a Police officer - it was in view of highly credible witnesses - I am sure a few thousand dollars towards an anger manager group for funding may and only may teach him a lesson regarding decorum and not to threaten persons with physical harm.