Subject: Re: UK wants to arrest, extradite US citizens...
First Amendment doesn't apply to other countries, though. In the literal sense, that is - most OECD countries have some analog to the First Amendment in their own national basic laws. But the specific protections of our First Amendment do not restrict foreign governments from imposing criminal penalties on speech in circumstances that would not be permissible in the U.S.

The UK could swear out an arrest warrant, hold a trial, reach a verdict and pronounce a sentence against any US citizen they want, all in absentia. While that US citizen would be in hot water if they ever dropped in the UK - where they would be subject to arrest - no sane US government would extradite on such a request. All that is true because the 1A applies to Americans on American soil. Its writ does not extend out past the borders.

Well...until Harris gets in office, that is.