Israel is a tiny country. Geographically it's 1/4 th of West Bengal, a state of India. It's very hard to save such a tiny country from such big neighbors.
World's one of the best intelligence agency and technological advancement are some of the reasons why Israel still exist today.
Imagine a Middle-East without Israel. That's a complete horror show not only for the region but also for the entire world.
For survival, Israel must expand to increase their strategic depth.