This is your error. States and peoples are not unitary entities with a single coherent outlook and will. The vast majority of the Israeli population is far too young to have directly experienced the Holocaust, which ended 80 years ago. There are plenty of people in Israel who do not want to commit atrocities against Palestinians. There are also people who feel that they have a (literally) god-given right to occupy the territories where Palestinians currently live. If you think of Benjamin Netanyahu's cabinet as being basically the same people who survived Nazi concentration camps in World War 2, then nothing Israel is doing in 2024 will make much sense.
To my mind, Israel's actions toward Palestinians (both in Gaza and the West Bank) are powerful evidence that nationalism inherently leads to atrocity no matter who's involved. If the cultural memory of being targeted by the Holocaust won't stop an ethno-state from setting up an apartheid regime, what will?
There's no question that the Holocaust has enormous salience to Israeli Jewish people. But if you trace your roots to rural Arab Jewish families from Yemen or Iraq, your more immediate concern would be your own family's immediate viability in a world without Israel. A new rise of European fascism wouldn't be your problem; the fact that you'd have literally no place to go would be. You're sure as shit not moving back to Yemen.
Zionists even false flag attacked Iraqi Jews to help spur immigration to Israel:
https://www.middleeasteye.net/news/iraq-jews-attacks-zionist...
Further, it doesn't matter. Most stats I've seen suggest that the Mizrahim are at least a plurality of Israelis, and none of those people can return to their "colonialist home countries". By way of example, long before the current Gaza war, the literal first "official" action Ansar Allah took when it established control of territory in Yemen was to expel the very few remaining Jewish families.
One reasonable way to think about Israel: their moral claim to Tel Aviv is much stronger than our claim to Dallas. And yet, for all the "turtle island" talk, no serious person entertains the idea of rolling back American sovereignty.
None of this legitimizes the ongoing military strategy in Gaza, or, for that matter, the West Bank crisis or the management of the 2-state process, something that the Israeli right has successfully and for decades worked to derail.
I only bring this up because I feel like there's a tendency in message board discussions to center Israel's legitimacy on the Holocaust, as if that's the sum total of what binds Israeli Jewish people to the land. No, it's much more complicated and deep than that.
That being the case (maybe it isn't!), there are two big problems with your strategy:
1. It isn't possible. They're not going anywhere.
2. It's incoherent. There are very few countries in the world with a morally-hygienic claim to their land. Certainly, with the possible exception of Egypt, none of Israel's neighbors can! They're all of them creations of France and the UK.
Israel can be disbanded just like South Africa was disbanded. It has less support than ever before politically.
South Africa wasn't disbanded, not even close. Apartheid ended more-or-less peacefully; non-whites were given the vote; and more-or-less democratic elections have been held ever since.