Dissolve the borders, and make the Palestinians and Israelis citizens of the same country. Limit citizenship to the people who actually live there -- none of this granting citizenship to any Jew anywhere in the world who wants it. Institute proportional representation. We don't need exclusively Jewish states any more than we need Muslim states or Christian states. Right of return for every refugee, maybe even reparations. Tear down the fence. End apartheid. Allow Jewish settlements in the West Bank, and allow Palestinian settlements in Israel. Open the gates to the refugee camps/ghettos and let the Palestinians free.
Give Jerusalem to the UN, and make it their new headquarters.