In the linked article Arnold Kling distinguishes between two modes of political discourse: persuasion mode versus demonization mode.
In persuasion mode, we treat people on the other side with respect, we listen to their logical and factual presentations, and we respond with logical and factual presentations of our own. In demonization mode, we tell anyone who will listen that people on the other side are awful human beings.
Later in the article Kling poses the following reasons why we tend to demonize people who disagree with us politically.
As individuals, we seek to minimize cognitive dissonance. It troubles me to believe that there are good reasons for people to disagree with my views. The dissonance goes away if I can dismiss those who disagree as driven solely by bad motives.
As social creatures, we are motivated to demonstrate loyalty to our tribe. Demonizing people of other tribes is a way of doing this.
Why have we devolved into demonization as our default mode of discussion? (How about that for alliteration?) Kling thinks its tied to how the mainstream news media.
As best I recall, fifty years ago, more of the commentary in newspapers, magazines, television, and radio was in persuasion mode, and less of it was in demonization mode. But in recent decades Rush Limbaugh discovered that demonization could appeal to a mass audience and Paul Krugman discovered that demonization could appeal to the readers of the New York Times.
While I agree with Kling that despite our ability to reason objectively we still harbor deep-seated tribal instincts that can challenge or at times over-ride our objectivity. I would argue that the influence of postmodern philosophy makes it even harder for some people to maintain their objectivity or makes it easier for them to succumb to primitive, tribal forces.
What is postmodernism? For a detailed explanation and analysis please refer to Stephen Hicks Explaining Postmodernism: Skepticism and Socialism from Rousseau to Foucault. Based on his study of postmodern writing he extracts the following summary. Warning: the quoted paragraph is long and uses philosophical terms but I think it’s worth plowing through it to get to Hicks’ main points.
Metaphysically, postmodernism is anti-realist, holding that it is impossible to speak meaningfully about an independently existing reality. Postmodernism substitutes instead a social-linguistic, constructionist account of reality. Epistemologically, having rejected the notion of an independently existing reality, postmodernism denies that reason or any other method is a means of acquiring objective knowledge of that reality. Having substituted social-linguistic constructs for that reality, postmodernism emphasizes the subjectivity, conventionality, and incommensurability of those constructions. Postmodern accounts of human nature are consistently collectivist, holding that individuals’ identities are constructed largely by the social-linguistic groups that they are a part of, those groups varying radically across the dimensions of sex, race, ethnicity, and wealth. Postmodern accounts of human nature also consistently emphasize relations of conflict between those groups; and given the de-emphasized or eliminated role of reason, post-modern accounts hold that those conflicts are resolved primarily by the use of force, whether masked or naked; the use of force in turn leads to relations of dominance, submission, and oppression. Finally, postmodern themes in ethics and politics are characterized by an identification with and sympathy for the groups perceived to be oppressed in the conflicts, and a willingness to enter the fray on their behalf.
Let’s see if I can digest Hick’s ideas a bit further. Before doing that I need to touch on his description of modernism, the philosophical outlook that preceded postmodernism. Modernism reflects the Enlightenment in which thinkers agreed that there is an objective reality and that we have the ability to reason from the facts to sound, objective conclusions that we can defend and explain.
