Earlier quoted context omitted.
It wasn’t and isn’t unthinkable in most of the world. “Free Speech” is an US thing. It pretty much doesn’t exist anywhere else as a right, and never has.
What about in Canada, Germany, England, France, India, Sri Lanka, Kenya, Spain, Italy, etc?
Canada it isn't an absolute right and has much more willingness from the country to amend "unacceptable expression". Which is different to the US quite substantially.
Germany you are right it has a similar framework to the US.
UK doesn't have this as a right outside of parliament (parliamentary speech is protected). So not sure why you raise this as a counter example.
France is a weird one to bring up... where they have banned certain kinds of expression in different settings (i.e no religious symbols). Extremely different from the US.
India similar to Canada has so many provisions (and willingness) in which to revoke this right, it's definitely not as strong as a constitutional right that the US gives.
Italy again its freedom of expression is tempered by a host of restrictions on that freedom.
I could go on... none of them are like the US having a constitutional right for freedom of expression that quite literally supersedes other laws.