And even if Israel can make it like North Korea, I don't think most Israelis would want that kind of life of being completely isolated from the world. If Israeli existence is reduced to isolation and extreme poverty - most would give up I think.
I've never been to Israel but have friends there. I disagree with 'most', they are very resilient and will not leave their home. I offered my home to one mother with a newborn while they were living in a bunker. They would rather stay at home with rockets hitting them than flee.