I think GJ was refering to Arabs Israeli. Anyway, Israel wouldn't collapse if foreign support was cut. The surrounding Arabs countries aren't going to attack a country with nukes, and anyone who think Hamas is a threat to Israel's existence is an idiot. I actually think it's the best thing for Israel, as it might force them to get on building a Palestinian state strong and legitimate enough to rein in Hamas.
Israeli arabs are "losing" the demographic race in israel. As israeli arabs become more and more educated, they bring less and less average kids per family. sadly, israelis only win because of the religious people in israel aren't getting educated over time and they keep their practices of bringing an extremely high number of kids per family.
the way i see it, israel is going to be doomed not because of surrounding arabs, but mainly because we, the secular majority, are collapsing under the economic pressure of financing a disproportional army, a sector of arabs that don't pay taxes, a sector of religious who don't work, rely on government aid and because of financing settlements in the west bank.
Comparing israel to north korea is either a result of ignorance or racism. no sane, educated person would ever make that comparison. even concering nukes and what not. if you wanna act worried about nukes, worry about pakistan, worry about iran, worry about north korea, worry about india, but you can sleep peacefully over israel.