If Egypt or the UN wants to take care of Gaza after the war, and actually make sure they don't get weapons, and actually de-radicalize them (current schools in Gaza are not great at deradicalization), you name it, I'm sure Israel would be on board with that.
Basically turn them into a mini West bank; people with no means to defend themselves, constantly getting attacked by settlers and the police. Make them believe that this is normal and that they shouldn't defend themselves on your way out.