If the assailant and target were reversed, would Western media hesitate at all to call it terrorism?
Or, forget Hezbollah and Israel. If ISIS had detonated thousands of explosive devices all over, e.g., the UK injuring and killing hundreds of UK military personnel and some civilians, would that not immediately be condemned as an act of terror, by everyone in the entire world, East and West? And rightly so?
If the designation of "terror" or "not terror" depends on who's attacking and whom they are targeting, then there's not much point in talking about terror or not terror at all.