But with all those other things on there as warnings, how would you fight it? You were guilty of multiple violations, and are lucky the cop didn't just stack them.

Also, when someone slows down to 70, don't tailgate them. It just pisses them off and makes them want to mess with you, is dangerous, and in this case was probably the guy slowing down because he saw a cop. He was essentially warning you, and you got aggressive.