From a comment on Political Animal, in a thread about a brick-thrower who wants to “end socialism and the government takeover”, and has time to do so because he’s receiving disability checks from the government.  In describing the futility of explaining this contradiction to the brick-thrower, a commenter pointed out,

You can’t reason someone out of a position they didn’t reason themselves into.

And that is the actual greatest threat to the Republic today: The noisy whiners who don’t know anything factual and are proud of it.  How does an Enlightenment democracy function, when one side denies the value of both logic and evidence?