That assumes either will survive the next big Middle Eastern war
Israel likely will. It acts pathetic during peace time & during long ‘wars’, but fights well when the games are over & it’s a matter of survival. It also has an advantage over most of the Middle Eastern states, which is that they’re not plagued by civil war & the ragings of barely-suppressed minorities.
Syria will keep it together as long as it brings prestige to Syria with its Greater Syria agenda. I think the next states on the chopping block are Palestine - if it gets created - & then Jordan. The Hashimites won’t be able to rule over 70% Palestinians for much longer. Iraq has higher probability of failure, but heavy American involvement will keep it artificially propped up for a while.