That just seems like semantics. It seems pretty fair to call country A bombing the shit out of country B and killing its leader an act of war.
I think a lot of my fellow Americans find it easy to not think of as a "war" because they see no risk of Iran attacking the continental US. They'll just send their thoughts and prayers to whoever deployed over there catches the bullets.
That's probably a huge part of it. How many billions of dollars have been spent engineering content on a screen to get its tendrils into people's minds and attention and not let go?
EnGaGeMent!!!