[1] https://eur-lex.europa.eu/resource.html?uri=cellar:2bf140bf-...
It seems to me that if I were an EU citizen, the EU would be the ones who had to remove my citizenship, and that would be a very controversial step. I don't recall long winded speeches in the UN denouncing the EU for forcefully removing the citizenship of millions of people, which leads me to think that it's not a "real" citizenship.
"Nigeria citizen" == "Nigerian nationality"
"EU citizen" != "EU nationality"
This was a serious curtailment to free speech. "shouting fire in a crowded theater" was a euphemism for telling people to dodge the draft during WWI, making this restriction an overt curtailment of free political speech. Thankfully though, this was overturned several decades ago. The current standard is that you can't "incite imminent lawless action", so for instance it's not legal to say "Hey everybody, let's lynch Mvandenbergh from that tree right now!" But to your point, this is still a restriction on free speech, it's not an absolute right in America. You are correct on that point.
1) Certain speech such as "shouting fire in a crowded theatre" has long been considered illegal.
2) The US has much more expansive laws about "conspiracy to..." which make it illegal to have certain conversations.
Oh, those don't count? Not real speech. Sure, why not.
3) Most people will experience very real economic consequences for a very wide range of speech. We're not all yeoman farmers entirely independent of paid employment.
That presumably doesn't count because only governments can restrict liberties? Well, have it your way but I would regard losing my job due to speech as a pretty severe restriction on my liberty.