How free is America?

From BadAstronomy

"For the record: yes, I am a card-carrying member of the ACLU. But the more important question is why aren’t you, Bob? Now, this is an organization whose sole purpose is to defend the Bill of Rights, so it naturally begs the question: Why would a senator, his party’s most powerful spokesman and a candidate for President, choose to reject upholding the Constitution? If you can answer that question, folks, then you’re smarter than I am, because I didn’t understand it until a few hours ago. America isn’t easy. America is advanced citizenship. You gotta want it bad, ’cause it’s gonna put up a fight. It’s gonna say “You want free speech? Let’s see you acknowledge a man whose words make your blood boil, who’s standing center stage and advocating at the top of his lungs that which you would spend a lifetime opposing at the top of yours. You want to claim this land as the land of the free? Then the symbol of your country can’t just be a flag; the symbol also has to be one of its citizens exercising his right to burn that flag in protest. Show me that, defend that, celebrate that in your classrooms. Then, you can stand up and sing about the “land of the free”."