This study helps us understand why people with equally strong moral convictions may vehemently disagree on political issues such as abortion, capital punishment and flag burning.....So, politics does have something to do with psychology after all, But it takes a "philosophy forum" to deny it ... — Apollodorus
Let me provide a very simple example as to why psychological analysis is a poor explanatory model for political attitudes.
Here is an article from Ezra Klein, a liberal political analyst, that attempts to explain, through a political psychological lens, why conservatives are far less concerned with Covid than liberals. (To be clear, this is a stupid article).
Klein writes in the article's prolegomenon that, "Put simply, conservatives are psychologically tuned to see threat, and so they fear change. Liberals are tuned to prize change, and so they downplay threat." He subsequently justifies this with several quotes from political scientists and social psychologists, including Jonathan Haidt. I will quote and emphasis:
“Liberalism and conservatism are rooted in stable individual differences in the ways people perceive, interpret, and cope with threat and uncertainty,”
Of the many factors that make up your worldview, one is more fundamental than any other in determining which side of the divide you gravitate toward: your perception of how dangerous the world is,”
“Conservatives react more strongly than liberals to signs of danger, including the threat of germs and contamination, and even low-level threats such as sudden blasts of white noise,”
Well that's weird, Klein realizes...because it's clearly American conservatives who are downplaying the virus to the point of denying it's very existence. It's completely antithetical to the statements above which emphasis, if not outright insist, on the "rooted stability" or the "fundamentality" of how reaction to threat molds political attitudes. "This is the opposite of what a straightforward read of decades of political psychology research would predict," writes Klein.
So, he asks half-a-dozen political psychologists directly to explain and they came up with three theories.
The first is that conservatives are "denying and repressing fear" and displacing directly bodily and health-related threats through fear of economic recession and instability. "For all we know," says on respondent, "Americans who are explicitly denying the problem are experiencing (even) more stress and anxiety than those who are not.” For all we know!
The second is that this is occurring because of hyper-partisanship messaging. Trump and other conservative politicians and conservative pundits are downplaying the coronavirus for political reasons. Haidt responds that Trump's message "overwhelms the
small average difference in disgust sensitivity which would, ceteris paribus, have Republicans more concerned about contagion." "Small average difference"? Above he was quoted as saying that conservatives "react more strongly" to germs and contamination than liberals. Well which is it? Likewise, Christopher Federico, a political psychologist who above stated that "Liberalism and conservatism were
rooted in stable individual differences" in regards to threat, responds to Klein saying "Chronic sensitivity to threat, disgust, and disease is one factor.... [but] it is not the only one.
Partisanship itself is perhaps the most important factor in shaping how people respond to issues or public concerns.” So now we move from political attitudes being" rooted in stable" psychological differences to oh actually this is really all explained by Trump's political hegemony with conservatives and political propaganda.
The third explanation basically connects the two, arguing that conservatives are threatened through xenophobia by Trump's anti-China messaging.
As you can (hopefully) see, what these political scientists and social psychologists are doing is providing half-baked supplementary hypotheses as to why, in their own words, their foundational theories and essential predictions are being contradicted by real-world conditions. And when they do provide a more accurate non-psychological explanation for why conservatives are minimizing the virus threat, viz. that they are digesting a wide apparatus of conservative messaging, including propaganda from the President, that is downplaying the virus for political reasons, their "rooted" and "fundamental" theories suddenly turn into gossamer.
So does Ezra Klein also come to the similar realization that political psychology is just bunk science? No, in order to retain the authenticity of the profession he offers a bland metaphor about how political psychology is like soil. Haidt suggests it's like the foundations of a house. If all you can do to is offer metaphor to defend an ostensible scientific theory then, buddy, you don't have an actual scientific theory.