Apparently, that's not true. I initially had that strong impression too, from the way estadounidenses talk on here, (like as if everyone in the world lives under US constitutional amendments etc) but I heard the majority are non-US. Last I heard, HN might have another survey on that question soon. I hope so, I'd love to know what the numbers actually are.

The first amendment is like 50 words long, you should read it.

If someone puts up a cardboard box on my property and begins a speech, I have the right to kick them off of my property. We have 'Free Speech Zones' which we kick protesters into so that their exertion of their rights doesn't bother other people. We have cases of senators getting people arrested solely because they laughed at them.

And that's ignoring our long history of suppressing people based on their race or origin. Black Americans are the first ones that come to mind, but we treated Italians and Asians as second-class citizens not that long ago as well. We've had this 'freedom of speech' right enshrined but not at all interpreted like people seem to think it was.