Israel did significantly worse to Gaza prior to 10/7 than gaza has cumulatively done to Israel to date, and it's not remotely close. An article I found from may 2021 cited 5600 dead palestinians (115,000 injured) and 250 dead Israelis (5600 injured) between 2008 and 2020. And it's actually a bit misleading to only use numbers back to 2008, because it goes back much farther.
So yes, it is accurate to say that had things continued as they were going, Palestine would have fully died out in the first half of this century.