This is a very difficult situation because in the one hand nobody wants to see innocent children suffering. But on the other hand, simply prolonging the fight by being soft, having ceasefires etc, is much worse in the long run.
It's what Israel has been doing ever since its inception, and it's what has caused thousands of deaths on both sides. Thousands of innocent deaths.
It sounds terrible to say, but at this point I think the only way forward is for Israel to win decisively. Historically this was always how peace and new hope blossomed. When one side lost and acknowledged its defeat. Germany and Japan are prime examples.
After WWI there was only an armistice, ie ceasefire. That paved the way for WWII and the many millions who died in those terrible years. After WWII, when Germany was routed, they looked to the future. Nazism was by and large eradicated, and Germany was rebuilt as a tolerant, peaceful and prosperous nation. Ditto for Japan.
When the people of Gaza realise this is a defeat and surrender (and hand back the hostages), that will be the moment they can start healing and rebuilding. It's just sad that their own government - Hamas - cares so little about them and are willing to fight to the last man.