When Germans bombed Rotterdam, Divis, it was viewed as terrorism (and it was). It was viewed that way by the Allies, not the Germans.
When the Allies bombed Hamburg, Dresden, and Tokyo, causing tremendously greater civilian death, it was viewed as legitimate warfare...by the Allies.
Well, if you had been a German or a Japanese, you would have known it for exactly what it was: terrorism.
War, you see, IS terrorism when it is inflicted on civilian targets on someone else's land. It's that simple.
War involves terrorism and mass murder. To call only one's political opponents terrorists is a cynical, phony, opportunistic game of words. It's propaganda. If you fall for it, well, you are among the majority of people who naively believe what their government tells them when it says that "evil" only exists on foreign ground and in foreign hearts. Such is not the case.