Out of immense frustration, some of us may feel the urge to shake a Trump supporter and say, “Hey! Don’t you realize that he’s an idiot?!” No. They don’t. That may be hard to fathom, but that’s the nature of the Dunning-Kruger effect — one’s ignorance is completely invisible to them.
2. Hypersensitivity to Threat

Science has unequivocally shown that the conservative brain has an exaggerated fear response when faced with stimuli that may be perceived as threatening. A classic study in the journal Science found that conservatives have a stronger physiological reaction to startling noises and graphic images compared to liberals. A brain-imaging study published in Current Biology revealed that those who lean right politically tend to have a larger amygdala — a structure that is electrically active during states of fear and anxiety. And a 2014 fMRI study found that it is possible to predict whether someone is a liberal or conservative simply by looking at their brain activity while they view threatening or disgusting images, such as mutilated bodies. Specifically, the brains of self-identified conservatives generated more activity overall in response to the disturbing images.