At least if you believe Evelyn Beatrice Hall, writing under the pseudonym of Stephen G Tallentyre in The Friends of Voltaire (1906). She paraphrased his sentiment as:
I disapprove of what you say, but I will defend to the death your right to say it.
This is not what I observe in Liberals, Progressives and Socialists. There the philosophy seems to be:
I disapprove of what you say, I will make sure no one hears you say it.
Mostly they hate Glenn Beck because the free speech he uses is their own words.
As goes Fox, goes all free speech.