Usually an invasion entails an intent to capture territory and occupy. A suicide terror attack is qualitatively different even if it’s large-scale. The boots on the ground could just as well have been rockets, whereas an invasion needs a longer term presence.
Palestinians crossed into israel from israel (occupied territories by israel). How can you invade yourself?
> occupied territories by Israel)
Gaza was not occupied. There was zero military presence in Gaza prior to October 7th.