Consider that if it was reasonable for Israel to murder many times more civilians in response to a Hamas attack on civilians, it would be equally reasonable for Palestinians to murder many times more Israeli civilians than that again in response to the IDF attack on Palestinian civilians.
But nobody have an inherent right to a reaction they consider fair, if that reaction involves brutally violating the rights of innocent third parties.
It's no less terror when the IDF kills innocent civilians than when Hamas does, and seeking to legitimise it is no less immoral.
Also, I'm not sure who you mean by "they". Let's talk about specific people: past governments are mostly dead, current generation was born into this situation the same as Palestinians were born into theirs. "They" (current Israeli population) can't end the occupation; there are no feasible options. So what "they" should do in case a neighboring nation kills a thousand of "them"? Again, these people have nothing to do with occupation. The kids at that rave party most likely considered themselves as far left (just given the demographics). I myself am far left; I'm a part of "them", and I'm against the occupation, but no one is able to come up with a solution that would satisfy both sides.
So when you talk about "them", whom do you mean? Who'd you expect would find a solution if you can't even solve this smaller moral dilemma of what your country's response should be in case of Oct. 7?
edit: like, how can you overreact if no one can say what "non-over" reaction should be?
And as I point out "overreaction" was the mildest term I'd consider using. Emotionally charged would be to call it mass murder and ethnic cleansing, and war crimes. An adequate reaction would be not to brutally murder civilians and carry out extensive war crimes.
> How do you measure "over"ness of a response to mass rape and torture?
By lack of adherence to international law. By any willingness to cause mass murder and engage in ethnic cleansing.
At the very least, by the time the IDF response had led to the murder of more civilians than the attack of terrorists they are hunting, they ought to consider that it is no more morally acceptable for them to murder civilians than the other side, and they've become what they claim to want to destroy.