You cannot express or advocate viewpoints that "harass people (beyond a some limits), threaten them, defraud them, incite violence, distribute copyrighted information that isn't yours, interfere with others' activities (sing loudly in a movie theater), etc."
For example, someone could not express the viewpoint that 'thebigwinning sexually assaulted coworkers and stole money at their last job'. It would slander you (an exception to free speech that I omitted in the GP) and you would be entitled to damages.
Nor could someone express to an angry crowd the viewpoint that 'the bigwinning should be assaulted', nor could someone selling cryptocurrency express the viewpoint that 'cryptocurrency is a safe, stable investment for unsophisticated investors', etc.
That's exactly what I'm not saying. These contrived examples only strengthen my view.
> sing loadly in a movie theatre.
Perfect example. Inappropriately making sounds with your mouth, not holding an illegal belief.
> express to an angry crowd the viewpoint
The issue is the context of the angry crowd, not the content of beliefs. Do you believe the US will penalize me for believing crypto currency is safe and stating that publically?
> thebigwinning sexually assaulted coworkers and stole money at their last job'
They are indeed allowed to believe that. They can't be taken to jail for holding that view of me.
Now if they tried to get me fired with false evidence that would be a problem. If they caused damage to my business reputation without evidence that could result in civil damages.
The examples are not contrived, they are commonplace legal issues (though any such issue is rare in any one person's life).
We are talking about speech, not thought - expression, not belief. You said "you can express and advocate for any view point", not that 'you can believe any viewpoint'.
Yes, all speech depends on context. The significance of speech is its impact on other people; it is communication. You can say whatever you want in the shower.
For example, someone could not express the viewpoint that 'thebigwinning sexually assaulted coworkers and stole money at their last job'. It would slander you (an exception to free speech that I omitted in the GP) and you would be entitled to damages.
Nor could someone express to an angry crowd the viewpoint that 'the bigwinning should be assaulted', nor could someone selling cryptocurrency express the viewpoint that 'cryptocurrency is a safe, stable investment for unsophisticated investors', etc.