Depends. The current standard in the US is "imminent lawless action", which bans "kill that guy now", but allows for "he should be killed"

https://en.wikipedia.org/wiki/Imminent_lawless_action

>Advocacy of force or criminal activity does not receive First Amendment protections if (1) the advocacy is directed to inciting or producing imminent lawless action, and (2) is likely to incite or produce such action