America constantly restricts expression it doesn't like. It's just that you believe being topless in the park is bad speech but calling for genocide is good speech. Billionaires using computers to slurp up and regurgitate others work is good, but people copying others work is bad. Saying "lets kill the president" is bad, but saying "lets kill the senator" is good.

America does not have a monopoly on what good and bad speech is, and it certainly restricts speech, via legal means, via cultural means, and via application of force.