While the article does reference Trump and Trump supporters in the title it is certainly not, as @ARE_you_kidding_me states ”...a petty attack on the intelligence of Trump voters.” It points out repeatedly that the D-K effect can effect the way all of us view a subject or action regardless of our political affiliation.
Do you just gloss over statements such those below and take it as a personal affront rather than viewing it as something worthy of consideration:
To be sure, well-informed voters accurately endorsed true statements about economic and social conditions in the U.S.—just as long as those statements agreed with their politics.
and
But both groups also endorsed falsehoods agreeable to their politics.
or
…it was the political lean of the fact that mattered much more than its truth-value in determining whether respondents believed it.
and
…endorsing partisan facts both true and false led to perceptions that one was an informed citizen
What about
…the key lesson of the Dunning-Kruger framework is that it applies to all of us, sooner or later. Each of us at some point reaches the limits of our expertise and knowledge. Those limits make our misjudgments that lie beyond those boundaries undetectable to us.
And
… if we find ourselves worried about the apparent gullibility of the Trump voter, which may be flamboyant and obvious, we should surely worry about our own naive political opinions that are likely to be more nuanced, subtle, and invisible—but perhaps no less consequential.
And @Jaxk I know you know better. Statements such as yours “The basic premise is that Trump lied, Common Core is good, and Trump won because voters are stupid. Nothing beyond the same old talking points.” Certainly make is appear that your mind was already made up before you even began and you have twisted the article to suit your own views or agenda.