With a few glaring exceptions, such as the late James Flynn, Leftists are systematically less interested in the truth than conservatives. Or to put it more bluntly, they lie more often. Thus a major research project has shown that, when findings in psychology have proven fraudulent, the findings almost always support Leftist ideology.
Leftists lie for myriad reasons. One is that they are systematically more mentally unbalanced than conservatives. High in Machiavellianism and vulnerable Narcissism, they crave status and adoration to deal with their feelings of low self-esteem, powerlessness and high mental instability. Those feelings cause them to fear a fair fight, and they therefore seek power covertly by virtue signalling about such matters as “equality.” This particularly true for women: Over half of young, female Leftists suffer anxiety or depression.
An example of their dishonesty: the way in which their actions speak louder than their words. “I think all races have equal intelligence,” a Leftist will say in denying average IQ differences between whites, blacks, and Asians. But he will then speak to blacks more simply than to whites, implying that he believes black people are less intelligent. See Self-Presentation in Interracial Settings: The Competence Downshift by White Liberals, by Cydney H. Dupree Susan T. Fiske, psyarxiv.com, September 7, 2018.
In contrast, conservatives will say “treat everyone equally” and so speak to blacks and whites in exactly the same fashion,