@evan my reasoning:
Israel is an occupying power over the Palestinian Territories which are recognized by International bodies as not a part of Israel, so it cannot be a civil war.
Also because the Palestinian people in Gaza have absolutely no standing in Israel politically, as citizens or otherwise, then again it can’t be a civil war.
Since Hamas is a governing body in Gaza the war can really only be described as a conflict between a nation-state and sub-national state.
So, strong no.