About the first part: if your social media network is spreading misinformation unmoderated and that causes damage to another country and you insist in promoting disinformation, your network is liable for this. Not the individuals necessarily, but those like Elon responsible brazenly using their status to promote the people saying people should be killed all over shitter.
About the second part: if it is a crime in the US too, it is extraditable, it is for the US to decide if there is equivalence, there is no jurisdiction of the UK in the US unless the US wishes to see citizens punished for doing to others what it would punish its own citizens for doing.
About the first part: if your social media network is spreading misinformation unmoderated and that causes damage to another country and you insist in promoting disinformation, your network is liable for this. Not the individuals necessarily, but those like Elon responsible brazenly using their status to promote the people saying people should be killed all over shitter.
About the second part: if it is a crime in the US too, it is extraditable, it is for the US to decide if there is equivalence, there is no jurisdiction of the UK in the US unless the US wishes to see citizens punished for doing to others what it would punish its own citizens for doing.