those who loudly theorize about their own personal love of freedom, and who insist that nobody else but them really knows what freedom is about.

Very much yes. I am constantly amazed by the wide variety of people who "know" that they are Absolutely Right, and everyone else is either Duped or Foolish. Obviously, there are people who know more about certain subjects than others, thanks to research and education. But a lot of people insist that they are correct with no back up at all, as far as one can see.

(Is it bad to admit that I sometimes wish I had their confidence?)