Its a farce to claim that what transpired was due to the officer feeling threatened as opposed to feeling offended. As the officer said, we aren't going to play this game. Watch the video again, when the officer opens the door and starts yanking on Hill, not a single officer even has their hand on their service weapon. No one there displays any behavior suggesting they felt threatened or concerned for their safety. And this is the difficulty I have with situations like this one. Of course Hill shouldn't have been rude, but no officer has any right or legal authority to lay hands on anyone because they don't like how they're being talked to. They have no right to teach anyone a lesson, and if they lack thick skin, they should probably find some other job before they get themselves or someone else hurt. This ain't two good old boys at a bar scrapping because one insulted the other. If you want to throw hands at someone who says something you don't like, you might need a different job. Cops don't get to punish, that's the job of the courts.
And ultimately this is an issued of First Amendment rights. The Supreme Court addressed this years ago explaining:
"the First Amendment protects a significant amount of verbal criticism and challenge directed at police officers. "Speech is often provocative and challenging. . . . [But it] is nevertheless protected against censorship or punishment, unless shown likely to produce a clear and present danger of a serious substantive evil that rises far above public inconvenience, annoyance, or unrest." Houston v. Hill, 482 U.S. 451, 461, 107 S. Ct. 2502, 2509 (1987)
Claiming officer safety to justify every abuse when an officer loses his cool isn't a loophole allowing the government to bypass the Constitutional rights of citizens.