However, in California, verbally threatening me (a "commoner") can be charged as "communicating a terrorist threat." I think the difference between that and assault is that assault requires someone's physical presence--i.e., it has to be in person--whereas "terrorist threats" can be communicated in writing or by phone. There is an element of direct threat (i.e., not shooting one's mouth off at a bar about how one will "shoot that so-and-so"), but not the direct presence.
I can assure you that communicating a threat to do harm to an individual or a group of individuals (either in person, or via some medium) was already illegal in every state in the Union, prior to the introduction of any legislation specific to terrorism.