I repeat--most of the ignorant hicks I have had to be around, in graduate school and elsewhere, have been leftists. Mark Levin once said something to the effect that leftism is the philosophy of the stupid, and I tend to agree with him. Ironically, these people often like to call themselves "liberals." They are in fact the very opposite--intolerant, authoritarians who have contempt for the Constitution and like to use the federal government to push other people around. It is those who today are often mislabeled as "conservatives" who are the true liberals, in the classic sense of the term.
Leftists show their disdain for most things American by running this country down every chance they get, while leading cheers for its enemies. Andy McCarthy discusses how their loathing of this country gives them common cause with Islamists in a very good book, "The Grand Jihad: How Islam and the Left Sabotage America."