Uh, your history classes have really failed you. These rights weren't novel, they were explicitly enshrined in the English Bill of Rights in 1689. Some of the other rights (particularly debtors' rights) date back to the Magna Carta in 1215.
> That's why you can't yell "FIRE!" in a crowded movie theater and cause a stampede that kills people, etc.
For the record, you're citing a 1919 US Supreme Court case that has been overturned. The current standard for free speech in the US is Brandenburg v Ohio , which holds that it is constitutionally-protected free speech to advocate violent overthrow of the government. Only speech that amounts to incitement of "imminent lawless action" is prohibited. Note, of course, that the freedom of speech only applies to the government's ability to restrict speech for its content (which, in the US, is extremely limited); the ability of private parties to choose whether or not to provide a platform for speech is considered freedom of association and does not rely at all on any of these decisions.
 For what it's worth, the actual speech given by Brandenburg is basically the same sort of speech you'll find in these manifestos.
It wasn't about giving freedom to the people, but shifting power from the monarchy to parliment.
The freedom of speech enshrined in the English bill of rights also isn't remotely comparable to the USA idea. It was about parlimentary priviledge - the ability for MPs to have freedom of speech while within parliment. It was about the freedom of parliment to debate and vote without interference from the monarchy. (Parliment can and does impose its own limits on freedom of speech within the chamber and MPs have been literally removed from the chamber for things they've said).
The UK has never had freedom of speech. We even had an official censor (Lord Chamberlain's Office) until 1968. Blasphemy was illegal until 2008, and wasn't just a legacy law which had been forgotten, but there were convictions for it right the way through to the 1990s at least.
Uh, your history classes have really failed you. These rights
weren't novel, they were explicitly enshrined in the English
Bill of Rights in 1689. Some of the other rights (particularly
debtors' rights) date back to the Magna Carta in 1215.
For the record, you're citing a 1919 US Supreme Court case
that has been overturned. The current standard for free speech
in the US is Brandenburg v Ohio , which holds that it is
constitutionally-protected free speech to advocate violent
overthrow of the government
Finally, Douglas dealt with the classic example of a man
"falsely shouting fire in a theater and causing a panic".
In order to explain why someone could be legitimately prosecuted
for this, Douglas called it an example in which "speech is
brigaded with action". In the view of Douglas and Black, this
was probably the only sort of case in which a person could be
prosecuted for speech.
This was not a comprehensive ruling on speech in general. It was an influential ruling on speech specifically meant to rouse others to action.
There are innumerable other types of speech this ruling did not address. Libel, threats, etc.
Forget about folks' educations failing them; your misconceptions could have been avoided with a simple Wikipedia visit. On the bright side, this experience reminded me to make my annual donation to Wikipedia. Obviously it's a sorely-needed resource.
I have no idea what you're trying to argue anymore here, because you seem to be both arguing that the concept of free speech was a radical invention of the American Revolution and that the fact that it predates the American Revolution is "pedantic."
(If you really want to be pedantic, the modern concept of expansive First Amendment rights is actually novel, but dates to the mid-20th century, when SCOTUS started interpreting these rights very expansively and setting up series of very stringent tests. I rather assume that the founding fathers would have been horrified at the depths that Brandenburg v Ohio went to protect offensive speech; it's certainly more radical than is the case in most countries even today).
> You're simply incorrect.
The statement "shouting fire in a crowded theater" is a reference to Schenck, where the justices used that as the example of why advocating against the draft was not constitutionally-protected speech, motivating the "clear and present danger" test that was explicitly overturned by Brandenburg's "imminent lawless action" test.
In other words, Brandenburg v Ohio was quite explicitly saying that the bar for what speech is considered so dangerous as to lose its constitutional protection should not be set at a level that is merely upsetting to people but rather at the level where it is at the literal cusp of violence.
> There are innumerable other types of speech this ruling did not address. Libel, threats, etc.
Of course not. But for the kind of speech that is in question, namely these white supremacist manifestos, it is exactly the case that rules.
As they say, I can explain it to you but I can't comprehend it for you. You're on your own now.