The relevant international bodies have decided that collective punishment is illegal, so regardless how much culpability israel personally feels innocent Palestinian civilians must bear, it is still a war crime. Any related complaints israel has ("human shields! this is hard!" etc) can be submitted, with evidence, to the same bodies for judgement, but that doesn't justify further war crimes.

The relevant international bodies have also decided that many of the other atrocities israel regularly perpetrates in Palestine should be criminal, and made them so. Thus, regardless of any justifications real or imagined, those further atrocities are still war crimes.

If there is to be sustainable peace in the region, it must start with the cessation of war crimes. Then the relevant international bodies can address Palestine's right to exist, which is equal in all ways to israel's, because Palestine is a country equal to israel, and Palestinians are people equal to israelis.

Do I foresee that this will happen? Of course not: every indication, including direct quotes from them, is that israel wants domination and ethnic cleansing, not equality and sustainable peace.