Haidt's research actually suggests this behavior is more common amongst progressives because they subscribe to a narrower moral framework based on fairness and harm-reduction while conservatives incorporate other elements such as loyalty, respect for authority, and purity. Thus, when the two disagree, conservatives, being concerned with fairness and harm reduction but not exclusively so, are able to understand the progressive position and understand why progressives disagree with them, but progressives are unable to likewise understand the conservative position and why conservatives disagree with them, so they assume wickedness instead.