The "state terrorism" term is only applied to Israel, and no other country, although their have been attempts to "hitch" our action in Afghanistan with this linguistic propaganda burden.
The "state terrorism" term has evolved recently in response to increased and undisputed tageting of civilians in Israel, which lefty propagandists cannot sidestep. Therefore, to make the Israeli's seem eqaul to or worse, the "state terrorism" buzz-phrase was concocted.
Other recent attempts in a similar vein have been an attempted revival of the "Zionism is Racism" canard. It is a nationalism, just like pan-arabism or what have you.