The goal is not to kill PalArabs in Gaza but to make Gaza pay a high price for every rocket Hamas fires. Take down Gaza's infrastructure and make the citizens miserable but not dead. Hamas will never give up its goal to destroy Israel. Peace is not an objective. Making life miserable but not deadly for the PalArabs living in Gaza MIGHT eventually convince the citizens that supporting Hamas is not the way. I don't give that high or low probability but it is worth a try.
Russia: U.S. plan to provide air cover for Syrian rebels undermines Damascus fight on ISIS (Reuters)
from the article: IDF chief: Gaza war against Hamas was an 'excellent' operation