Iran’s unprecedented attack on Israel on April 13 has significantly escalated the tensions between the countries. For the first time, a declared and extensive Iranian military operation was carried out on Israeli territory. Now, the decision on how to respond rests with Israel. A direct war between the two countries now no longer seems unlikely.
Israel now realizes that it underestimated the consequences of its attack on an Iranian facility in Damascus that killed several senior members of Iran’s Islamic Revolutionary Guard Corps earlier this month. However, the exceptionally large scope of Iran’s response and the direct impact on Israeli soil is viewed in Israel as a disproportionate action that significantly escalates the conflict.
Despite the interception of most of the weapons launched by Iran and the lack of significant damage on Israeli territory, the outcome of the Iranian attack could have been vastly different due to the uncertainties of combat. Consequently, in Israel, there is a strong focus on Iran’s intentions and Tehran’s willingness to risk a direct confrontation.
Since Israel does not want to depend solely on defense and aims to prevent the normalization of attacks on its territory, it appears resolute to respond, reinforce its deterrence, and inflict a significant cost that will make Iran’s decision-makers think twice before attacking similarly again.
While some in Israel advocate for a robust immediate response to project power and display independence despite international pressures, others prefer a more cautious and measured reaction to limit the risk of escalating into a major regional war.
Several main response options are under consideration, possibly in combination: a diplomatic move, such as forming a regional defensive coalition against Iran and its armed allies in the “axis of resistance,” or revitalizing international efforts against Iran’s nuclear program; a covert kinetic operation, like past operations attributed to Israel targeting nuclear or missile facilities; or an overt kinetic military initiative, such as a missile or aircraft strike on Iranian territory.
Both covert and overt kinetic actions can vary in intensity and target different sectors—military, governmental, or nuclear.
Currently, there is significant attention on the potential for Israel to execute a kinetic move against Iranian nuclear sites, covertly or overtly. Iran itself recently closed these facilities due to security concerns—a move noted by the international community, including the Director General of the International Atomic Energy Agency (IAEA), Rafael Grossi, who stated that inspectors have been temporarily withdrawn.
Within Israel, some perceive the current situation as an opportunity to impair Iran’s nuclear program, considered a primary national security threat. The possibility of a military strike is reportedly under examination. In contrast, Meir Ben-Shabbat, former head of the National Security Council, suggested that Israel should target the Iranian nuclear program through diplomatic avenues.
The ability to execute an extensive and effective kinetic operation against Iran’s nuclear facilities on a short notice is doubtful. Such a move is also likely to lead to upheaval in the Middle East, contrary to Israeli officials’ statements that a military response will not lead to a full-scale war with Iran.
Conversely, a precise strike on nuclear facilities in Isfahan, Natanz, Araq, or Fordow could not only rekindle international attention toward Iran’s nuclear aspirations, it would also affirm Israel’s commitment to act after several years without significant action in that regard. In doing so, Israel could demonstrate resolve, conveying clearly that it does not accept the nuclear precedent Iran has established in recent years and is willing to take decisive action if necessary, even if opposed or not supported by the international community.
Moreover, a successful attack on a heavily protected target would highlight Israel’s superior capabilities and would undermine the new game rules that Iran attempted to establish. This, in turn, could decrease the likelihood of future attacks on Israeli territory.
Regionally, attacking a nuclear site could bolster Israel’s image as the sole nation daring enough to confront Iran and counter its provocations, particularly following the security breach on October 7. This action could effectively demonstrate Israel’s determination, showcase its military edge.
However, an attack on Iran’s nuclear facilities carries significant drawbacks.
In the short term, it would considerably increase the likelihood of a retaliatory response from Tehran, potentially even more severe, targeting sensitive locations in Israeli territory, and possibly extending to American and Jordanian interests in the region. This could inhibit the possibility of employing measured escalation levels and quickly lead to a broader conflict.
Hezbollah, which Iran sees as one of its assurances in case of an attack on its nuclear facilities, might be compelled to intensify its assaults against Israel.
Moreover, an attack on Iran’s nuclear facilities may have the opposite result of prompting an escalation in Iran’s nuclear developments, a pattern previously observed in response to kinetic actions attributed to Israel.
Such an attack could be used by Tehran as a justification and motivation to progress toward nuclear weapons development, confirming that conventional deterrence is insufficient. In recent years—and in past months even more so—senior Iranian figures have increasingly hinted at this possibility.
An overt attack on Iran could also diminish Israel’s legitimacy and international support, which momentarily recovered amid a historic low following the war in Gaza. This erosion could jeopardize diplomatic efforts to establish renewed coalitions and strategies against Iran.
Although it is crucial for Israel to impose a significant cost on Iran in response to its April 13 attack to deter further aggressive actions in the region, targeting nuclear facilities might be strategically disadvantageous.
The costs could heavily outweigh the benefits, and Israel should be prudent to focus on a proportionate response, such as targeting missile and drone infrastructures in Iran or other Iranian assets in the region.
At the same time, it is vital to invest in a substantial political response, such as forming a defensive coalition against the resistance axis and incorporating into it countries threatened by Iran under international auspices. Amid an emerging contest of superpowers in the region and beyond, such a political response also presents an opportunity to foster closer ties and strengthen commitments between these nations and the West.
Assaf Zoran is a research fellow with the Project on Managing the Atom and International Security Program at Harvard Kennedy School’s Belfer Center for Science and International Affairs. He is an attorney with 25 years of experience addressing policy and operational issues in the Middle East, engaging in strategic dialogue with decision-makers in Israel and other regions.
