Anything less is akin to not completing an antibiotic regimen. The surviving resistant pathogens only come back worse.
The job will only be “finished” when the last male Muslim over ten years of age is dead. Not just in Gaza, but everywhere.
Israel is far more worried a bout the tunnels, than the rockets...Tunnels are a perfect all but foolproof, delivery system for a WMD....and there’s a lots of NBC material floating around the Middle east..
Finish the job? Not a recent trait in western-world politicians, who often snatch defeat from the jaws of victory. For example, Bush the elder failed to finish the first Gulf war by deposing Saddam. Vietnam. The premature cut-and-run in Afghanistan.
The D9 solution, plow it all under then pump seawater over it for a year or two.