I don’t see it as that big of a problem, countries with exclaves exist, could be something like Armenian-Azerbaijani solution with mutual corridors (though this one has shown to fail miserably). The fact that Fatah and Hamas went their own direction is a bit more of an issue. My position is simple, though - Israel should fuck off all occupied territories, including those of Syria and Lebanon, and lift all blockades they have enacted. They can put as many walls and iron domes as they want, but fuck off the territory that doesn’t belong to them. Whether Palestine re-unites after that or remains as two independent states is then up to Palestinian people to decide.