The US has a version of free speech that is more open than others and a good example for others (speaking as someone not from or in the US). You can say things in the US that would get you brought into a human rights tribinal in Canada. That could land you in jail in Germany or expelled elswhere. You do have limits around other's rights and terrorism but they try to strike a balance like most western nations. But the fact that free speech is a right by default is very different from other nations where its easier to censor if the view isn't morally acceptable.