Defensible borders’ key feature, in the Middle East, must be the capability to confront the shifty, volcanic and violent reality of the region, which has been top heavy on worst-case scenarios, highlighting clear and present lethal threats.
Realistically, Israel’s defensible borders should not be based on well-meaning, peaceful coexistence (best-case) scenarios – cushioned by eloquent statements, agreements, assurances and guarantees – which have been detached from the blustery Middle East inter-Arab and inter-Muslim reality since the 7th century.
The most critical feature/test of defensible borders in the Middle East is their capability to fend off realistic (worst-case) scenarios.
The most critical goal of defensible borders is long-term survival/security in the turbulent, unpredictable Middle East, rather than advancing (pertinent) peace accords in a region, which has yet to experience long-term, inter-Arab peaceful coexistence.
Defensible borders must be drawn on the basis of Middle East reality, which accentuates the inherent tenuous nature of Arab/Islamic regimes, and therefore the unstable nature of their policies and accords, including peace agreements. The latter can rarely be more durable than the regimes which conclude them.
Israel’s defensible borders must provide for an effective response to – or better yet, deter – conventional and non-conventional attacks, as well as assaults by regular military forces and terror organizations.
Israel’s defensible borders reflect the realization that military high-tech today may be military low-tech tomorrow, but high-ground today will be high-ground tomorrow, playing a most crucial role in delaying potential invasions, providing time for the deployment of reservists, which constitute 75% of Israel’s Defense Forces.
Israel’s defensible borders should be war-restraining (a bolstered posture of deterrence) rather than war-enticing (a slackened posture of deterrence).
Israel’s defensible borders should enhance its status as a national security producer, rather than a national security consumer; a geo-strategic asset – not a liability – of the US and the pro-US Arab regimes; thus, extending the strategic hand of the US, while minimizing the number of US troops in the region.
Israel’s defensible borders generate a tailwind to its determination to avoid reliance on non-Israeli soldiers – a critical component of US-Israel cooperation, and a prerequisite for Israel’s survival and stature in the Middle East.
A reference to the indefensibility of the pre-1967 borders – “something of a memory of Auschwitz” – was made by the late Abba Eban, who was one of Israel’s leading doves, in a November 5, 1969 interview with the German weekly, Der Spiegel: “The map will never be the same as on June 4, 1967. For us, this is a matter of security and principles. The June  map is for us equivalent to insecurity and danger. I do not exaggerate when I say that it has for us something of a memory of Auschwitz. We shudder when we think of what would have awaited us in the circumstances of June, 1967, if we had been defeated; with Syrians on the [Golan Heights] mountain and us in the valley, with the Jordanian military in sight of the [Mediterranean] sea, with the Egyptians in Gaza. This is a situation which will never be repeated in history….”
The critical role played by the mountain ridges of Judea and Samaria [the “Golan Heights” of Jerusalem, Tel Aviv, Ben Gurion Airport and most of Israel’s population, transportation and industrial infrastructures] in forging defensible borders was documented on July 29, 1991 (Congressional Record – Senate) by the late US Navy Admiral James Wilson “Bud” Nance, who served as Staff Director of the US Senate Foreign Relations Committee (“Forcing Israel to give up land for peace is wrong”):
“The West Bank is the prime strategic defensive real estate in the area. Without the West Bank, most of the major population and industrial centers of Israel are easily within artillery [and terrorism] range…. [The West Bank] is a natural barrier to any attack on Israel from the east. The Judean mountains and Samarian Ridge that run down the north-south axis of the West Bank afford complete domination of the area…. Any attacking army would have to climb from the lowest point on earth (the Dead Sea) to the 3,000 ft elevation of the West Bank Mountains…. With the West Bank, the Israelis have one of the world’s best natural tank and armored vehicle traps…. The western slopes fall gently down to the heart of Israel [a dream platform of terrorism and invasion]….
“Without the West Bank, Israel is only 9 miles across at its center close to Tel Aviv…. This is scarcely more than the distance from the Pentagon to Mount Vernon [and between JFK to La Guardia airports, and the length of DFW Airport]. A modern tank can traverse this distance in about 15 minutes…. With the West Bank, Israel is approximately 40 miles across at its mid-point…. In this thin strip, we have 2/3 of Israel’s Jewish population and ¾ of their industry…. If Israel were to move out of the Golan Heights, the West Bank and the Gaza Strip, it would (1) increase the instability in the area; (2) increase the possibility of war; (3) increase the necessity for Israel to preempt in war; (4) increase the possibility nuclear weapons would have to be used to prevent an Israeli loss; (5) and increase the possibility of US involvement in a war in the area…. It is not in the US’ best interest to have Israel leave the disputed areas….”
On June 29, 1967, General Earl Wheeler, Chairman of the US Joint Chiefs-of-Staff, submitted to President Lyndon Johnson and Secretary of Defense Robert McNamara, a memorandum on Israel’s minimum territorial security requirements:
“Control of the high ground [in the West Bank]… would provide Israel with a militarily defensible border…. The high ground running north-south through the middle of West Jordan overlooks Israel’s narrow midsection and offers a route for a thrust to the [Mediterranean] sea which would split Israel in two parts…. [The West Bank is] an area where launching of saboteurs and terrorists into Israel was relatively easy…. Israel must hold the commanding terrain east of the boundary of June 4, 1967 [the Golan Heights] which overlooks the Galilee area….extending from the border of Lebanon to the border of Jordan…. Occupation of the [Gaza] Strip by Israel would reduce the hostile border by a factor of five and eliminate a source for raids and training of [terrorists]….”
The 2019 global and Middle East reality is much more explosive, threatening and tenuous than it was in 1967, including the unprecedented proliferation of Islamic terror organizations, equipped with conventional and non-conventional military systems, which has intensified lethal threats to each relatively-moderate Arab regime (e.g., Egypt and Jordan).
In 2019, the world and the Middle East face turbulent multi-polarization – intensified by the unprecedented proliferation of military hardware among rogue regimes and terror groups – rather than the relatively-manageable bi-polar world of 1967. This has dramatically destabilized the world, thus enhancing the critical importance of defensible borders, especially in the Middle East, which has been a role model of instability, unpredictability and temporary regimes/policies/accords.