The Aims of Argument is a process-oriented introduction to argumentation with unique coverage of the aims, or purposes, of argument - to inquire, to convince, to persuade, and to mediate. In contrast to other approaches, the focus on aims provides rhetorical context that helps students write, as well as read, arguments.
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.