Well, it sure depends doesn’t it? First of all, let’s correct your analogy. If you kill my family, then run behind your own family and yell I’M RELOADING FOR THE NEXT KILLING, that would be a more accurate analogy. In that case, I sure as shit have the right to defend myself. Israel told the Palestinians to get out of the way. Hamas told them to stay and die in their homes. If Palestinians would rather listen to a terrorist organization, if they would rather defend Hamas with their life, then they are literally terrorist supporters and they deserve what they get.
You realize launching rockets from civilian infrastructure, like Hamas does, is a war crime? Taking civilian hostages, war crime. Using civilians as human shields? Also war crime. Did you want to skip past those too? Man, Israel just can’t catch a break with you.