Before I start, I must declare my bias. I am biased against stupid human beings. But by that pejorative term, I do NOT mean low IQ persons, I mean people who are ignorant (in one field or another) and have no interest in fixing that ignorance with facts and history. Another qualification is needed: none of us can have an interest in every field, and that is fine. But if someone has a need to share his opinions on a subject, despite his ignorance of the facts and the history of that field, he qualifies as STUPID in my mind. And, potentially dangerously stupid, too.
OK, please show us examples of stupid people, stupid Americans. Americans who do not care about facts or history.