The Aims of Argument , a comprehensive text for teaching argument, recognizes that people argue with a range of purposes in to inquire, to convince, to persuade, and to negotiate. It offers a clear, logical learning sequence rather than merely a collection of inquiry is the search for truth, what we call an earned opinion, which then becomes the basis of efforts to convince others to accept our earned opinions. Case-making, the essence of convincing, is then carried over into learning how to persuade, which, requires explicit attention to appeals to character, emotion, and style. Finally, the previous three aims all play roles in negotiation, which amounts to finding and defending positions capable of appealing to all sides in a dispute or controversy.
I get that the editors have a left-leaning bias. But stop using right-wing rudeness as the only example of specific people being rude. It's an insult to the intelligence of your readers, and displays your own lack of credibility.
Oh, and by the way? So does downgrading left-wing criminality to rudeness because you feel that right-wingers are just that bad. If you can't be fair to both sides, act like the adults you presumably are and leave out specific examples entirely.