Israel supported Hamas as an opposition to the PLO the PLO didn’t fucking exist anymore when Hamas being supported by the Israeli government, Hamas started out as a humanitarian aid group affiliated with the Muslim brotherhood and radicalized before the second intifada, they were supported to undermine the PA who had been created as part of the Oslo Accords (that Israel then ignored), the most prominent example f this being when the IDF conducted air strikes against Fatah (the actual PA government) during the Hamas - Fatah civil war.

Yes the Israeli government helped create Hamas to undermine any attempt at negotiation towards a two-state solution, and a few dead Jews are no biggie, in fact they died as martyrs to justify genocide, you know eggs and omelets, this isn’t out of the ordinary behavior for genocidal regimes.