From NYT, on the article about car-bombing of a senior Hezbollah commander:
"Gideon Ezra, a minister from the governing Kadima Party in Israel and former deputy chief of the Shin Bet internal intelligence agency, told Israel Radio on Wednesday that many countries had an interest in killing Mr. Mugniyah, but that “Israel too was hurt by him, more than other countries in recent years.”
Mr. Ezra said, “Of course I don’t know who killed him, but whoever did should be congratulated.”"
Sounds familiar? Osama Bin Ladin and his men were "freedom fighters" when they fought Soviet occupation in Afghanistan. The moment they turned their attention to the US, they became... the terrorists, too.
By the way, the terrorism is defined by State Department thusly: "Premeditated, politically motivated violence perpetrated against noncombatant* targets by subnational groups or clandestine agents, usually intended to influence an audience."
The reason "subnational" is here because the moment you start applying this definition to the nation-state, any war action can be classified as "terrorism". For example, bombing of Hiroshima or fire-bombing of Tokyo or Leipzig. They all were designed to make a political point ("influence" the people of the other countries to stop fighting). That would exclude war as a means of resolving international conflicts, something that the US does not want to do.