Why Do Leftists Think That Their Opponents Must Be Dumb?

I’ve noticed a trend among left-wing commentators towards assuming that their political opponents are not just wrong, and are not even just bad people, but are actively dumb.

Take their attitude towards Donald Trump’s nerdiest friend. “Elon Musk is a dumb guy,” they tell us. “Elon Musk is a bit of an idiot.” Elon Musk is “a deeply stupid and incompetent …