I am simply using his own medicine on him. I do not believe the term "terrorist" has any legitimate value. It's a term created by the state to differentiate state controlled violence versus non-state. It's a political tool that is flimsy.
But if we really want to use the term terrorist. I would absolutely argue that Israel is a terrorist state. They kill more civilians than any of the other "terrorists" in their region.
terrorism—the use of violence, especially against innocent civilians, to advance political, ideological, or religious goals
Self defense is not ideological political or religious goal