20 Years Later: Lessons from Israel’s Disengagement

Twenty years ago, Israel left Gaza with hopes of security and peace. Instead, it got rockets, war, and the deadliest attack in its history. What went wrong?

On February 16, 2005, in a 59-40 vote, the Israeli Knesset approved the Gaza disengagement plan. By September of the same year, Israel completed the withdrawal of approximately 8500 settlers and its military forces from the Gaza Strip. The core justifications for the evacuation remain relevant today: Addressing demographic concerns, reducing the Israeli military burden, and alleviating international pressure.

However, the decades that followed were disappointing, if not disastrous. The Hamas takeover after the 2006 elections led to a surge in rocket attacks, culminating in conflicts in 2008, 2012, and 2014—and ultimately, the October 7, 2023 attack, which resulted in 1,200 Israeli deaths and the kidnapping of 250 hostages. In response, Israel imposed a tight blockade, launched repeated military operations, and began a full-scale campaign to remove Hamas from power.

So what went wrong?

In this article, I will discuss three key lessons Israel should have learned from the Gaza disengagement—and did not.

Adjust Security Strategies to Shifting Military Realities

When unilateral disengagement was first discussed in Israeli national security circles, the military landscape was fundamentally different. Strategies that were effective in the 20th century no longer apply. The key shift is what I call the “democratization” of advanced weaponry. Weapons once exclusive to global superpowers—ballistic missiles, drones, and precision-guided rockets—are now widely available to small, primitive militant groups. This has dramatically altered the nature of warfare.

The belief that a physical barrier can ensure security has proven dangerously flawed. Terrorist groups no longer need conventional armies to inflict large-scale destruction. They can bring the war to Israeli cities. Israel must adapt its security doctrine to modern threats. Relying on passive defense mechanisms—such as barriers or deterrence—is insufficient.

The Palestinian Authority is not a Viable Alternative

Since the Oslo Accords, the US and Israel have made tremendous efforts to reform the Palestinian Authority (PA) into a governing entity that could provide security and stability. Yet, the experiment has failed—not due to operational flaws, but due to a fundamental contradiction:

• If the PA is radicalized, it cannot serve as a partner for peace.
• If the PA is moderated and reformed, it lacks legitimacy among Palestinians and will eventually collapse, as seen in Gaza in 2007.

The Hamas takeover of Gaza was not a result of insufficient training for PA forces. It happened because the PA could not deliver what many Palestinians demand: Continued armed struggle against Israel. Therefore, Israel must abandon the idea that a reformed PA can be a long-term solution for Israeli security in Gaza or the West Bank.

Preemption Should be the Core of Israeli Strategy

Even after witnessing Hamas’s terror tactics for decades, Israel miscalculated its broader motivation. While Israel and Hamas had limited conflicts in 2008, 2012, 2014, and 2021, Israel still believed Hamas could be deterred from launching a full-scale war.

Meanwhile, the terrorist group was systematically preparing for a large-scale assault by building a vast tunnel network for infiltration, increasing weapons stockpiles including rockets, as well as advanced attack capabilities, including drones and naval threats.

Instead of eliminating these threats early, Israel hesitated—mainly out of fear of international condemnation. However, the October 7th attack proved that deterrence had failed. Once war broke out, global reactions showed that Israel was blamed regardless of who fired the first shot. From now on, Israel must proactively destroy terrorist infrastructure before it becomes an existential threat. Future security policy must prioritize preemptive strikes over waiting for the enemy to act first.

Conclusion: Securing the Future

Recent Israeli preventive counter-terrorism operations in the West Bank indicate that Israel has begun learning from past mistakes. However, the true test lies in long-term strategic decisions. If Israel fails to internalize these lessons, another massacre like October 7th is inevitable. The time for hesitation is over—Israel must prioritize preemptive security, abandon illusions about the PA, and reshape its defense strategy to meet modern threats.