This is an convictable crime in the US. Inciting violence is emphatically not protected speech.
It didn't happen in the US though, so that's neither here nor there. America's political system is not some benchmark that the rest of the world needs to judge themselves against.
This is definitely not a crime in the US per the US Supreme Court. Several additional conditions not in evidence are required for speech of this type to fall outside of First Amendment protections.