Israelis are really all about controlling their homeland and don't have some grand design over the entirety of the Middle East like some people believe. Controlling more territory really isn't in their best interest, as they don't have the population or the resources to both successfully manage as a part of their nation and safeguard from hostile forces.
Israel has gained more territory in the past, but that was never their main goal in any war. Their aim is defense, and taking control of land can come about when you repel hostile armies and keep them at bay. Israel historically is willing to negotiate with and forfeit these lands for peace, which they did with Sinai and Egypt (which was successful) and Gaza with the Palestinians (which was unsuccessful). You may be asking about the Golan, and I'll grant that has been incorporated much more into Israel; but, Syria has done nothing to open peaceful channels anyway and besides, it's not completely off the table if they want peace. Sinai and Gaza had communities that were ingrained as Israeli too, but they were relinquished all the same. Peace is much more of a requirement for Israel when it comes to the Golan, though, given how the position has the higher ground and Israeli villages were shelled by Syrian hostiles from that position.