The state does exist. The state is inherently built on crimes. Saying this state must cease to exist does not mean that the people should cease to exist.

Again taking Nazi Germany as an example. The German Reich ceased to exist. There is no Führer, no Reichschancellor, Reichsgovernment… Incidently there is a movement called “Reichsbürger” (citizens of the Reich) that proclaim the Federal Republic of Germany is a company and not a sovereign nation, so instead they claim the Reich to still exist. But it does not.

There was no genocide against Germans to make the Reich cease to exist and while there were ample use of strategies that by todays standards are war crimes against the Reich, the responsibility for starting the war laid with the Germans.

If we apply this to the state of Israel. Israel started to ethnically cleanse the area. Israel is inherently an Apartheid regime and the current state would never obey by international law, end the illegal occupation, give back stolen land, recompense the victims, punish the criminals and give equal rights to Palestinians living inside the internationally recognized borders of the state of Israel. The Israeli constitution itself says that Israel is a Jewish ethnostate, thus by the constitution Israel is a racist and criminal state in violation of international law.

You cannot reform this state like you couldn’t reform the German Reich. The state and all of its institutions need to be rebuild from the ground up. And then in a way that grants equal rights and justice for all living between the river and the sea.