Why Israel and Iran Are Enemies: The Conflict Explained
Israel and Iran are separated by more than 1,000 kilometers, but their rivalry reaches across the Middle East. Map: Torsten/Wikimedia Commons, CC BY-SA 3.0.
Iran and Israel maintained quiet political, economic and security ties before Iran’s 1979 Islamic Revolution. The partnership collapsed as revolutionary ideology and a regional struggle for power turned the countries into adversaries. Armed groups, missiles and the nuclear dispute later deepened that rivalry.
Israel sees Iran as its most serious long-term threat because Tehran rejects Israel's legitimacy, supports armed groups that attack it, has built a large missile force and developed a nuclear program that could potentially bring it closer to a weapons capability.
Iran sees Israel as a hostile regional power backed by the United States. Iranian leaders present support for Palestinians and opposition to Israel as central parts of the Islamic Republic's identity and foreign policy. Tehran has also used partnerships with armed groups to extend its influence and deter attacks far beyond Iran's borders.
The result is a security dilemma: actions one side describes as defensive are interpreted by the other as preparation for attack.
From partnership to the 1979 rupture
Under Shah Mohammad Reza Pahlavi, Iran was a close partner of the United States and maintained unofficial relations with Israel. Iran granted Israel de facto recognition in 1950. The two countries traded, shared intelligence and cooperated against common regional rivals.
The relationship was pragmatic rather than popular. Many Iranians sympathized with the Palestinian cause, but the Shah viewed Israel as a useful partner in a region dominated by Arab states and Soviet influence.
The Islamic Revolution overthrew the Shah and created a theocratic republic led by Ayatollah Ruhollah Khomeini. The new government cut relations with Israel, transferred the former Israeli embassy in Tehran to representatives of the Palestine Liberation Organization and made opposition to Israel part of its revolutionary message.
This shift was ideological, but it was also strategic. Challenging Israel and the United States helped Iran present itself as a leader of resistance in the Muslim world, while competing with U.S.-aligned governments for regional influence.
The Palestinian cause and Iran’s armed partners
Iran argues that Israel was established through the displacement of Palestinians and says the political order should be replaced by a vote involving all Palestinians and Israelis. Israeli officials view such positions — together with hostile rhetoric from Iranian leaders — as a threat to the state's survival.
Iran has funded, armed or trained Palestinian militant organizations, including Hamas and Palestinian Islamic Jihad. These groups have their own leadership and interests, but Iranian support has increased their military capabilities. Israel, the United States and other countries designate both groups as terrorist organizations.
After Israel invaded Lebanon in 1982, Iran helped build Hezbollah, a Lebanese Shiite movement that became one of the region's most powerful non-state military forces. Hezbollah fought Israel for years and amassed a large rocket and missile arsenal.
Iran also developed relationships with militias in Iraq and Syria and with the Houthis in Yemen. These groups are often called the “axis of resistance.” They are not all controlled in the same way, and each has local goals, but together they allow Iran to pressure Israel and U.S. interests from several directions.
Israel sees this network as an attempt to surround it with missile and drone threats. Iran sees it as forward defense: a way to keep adversaries away from Iranian territory and deter an attack on the regime.
The nuclear dispute
Iran says its nuclear program is for peaceful purposes and denies seeking an atomic bomb. Israel and Western governments fear that Iran's uranium enrichment, nuclear knowledge and advanced centrifuges could shorten the time needed to produce weapons-grade material if Tehran made that decision.
Israel is widely believed to possess nuclear weapons but has never officially confirmed or denied it. Israeli leaders have repeatedly said they will not allow Iran to acquire a nuclear weapon.
In 2015, Iran and world powers reached the Joint Comprehensive Plan of Action, or JCPOA. Iran accepted limits and inspections in exchange for sanctions relief. The United States withdrew from the agreement in 2018 and restored sanctions. Iran later exceeded several of the deal's limits. The collapse of the agreement deepened mistrust and reduced the diplomatic space between the sides.
How the IAEA verifies Iran’s nuclear program
IAEA safeguards operate through agreements with individual states. Inspectors compare nuclear-material reports with inventories on site, verify that facility designs match information declared to the agency, and may collect environmental samples. Seals, cameras and other monitoring equipment help preserve continuity between visits.
Scope depends on the agreement in force. An Additional Protocol, when applied, gives the IAEA broader access to information and locations, strengthening checks for undeclared activity. It is a separate legal arrangement, not a blanket right to enter any site.
For Iran, the IAEA’s report dated September 1, 2026, said it had not received information on the safeguards status of the country’s declared facilities or associated nuclear material and had no access to them for in-field verification during the reporting period. The agency therefore could not fulfill its safeguards obligations or verify whether enrichment-related activities had been suspended. The report also said Iran stopped provisionally applying its Additional Protocol in February 2021. These statements describe verification limits at the time of the report; they do not by themselves establish that Iran decided to build a nuclear weapon.
Decades of shadow war
For years, the conflict unfolded mostly below the threshold of open war. Israel carried out hundreds of strikes against Iranian-linked targets in Syria and was accused of sabotage and assassinations connected to Iran's nuclear program. Iran and its partners attacked Israeli interests, ships and regional bases. Cyberattacks became another front.
This “shadow war” allowed both governments to apply pressure while limiting the risk of a full regional conflict. But every strike created a new chance of miscalculation.
When the shadow war became direct
In April 2024, Iran launched hundreds of drones and missiles at Israel after a strike on an Iranian diplomatic compound in Damascus killed senior Revolutionary Guard commanders. Israel responded with a strike inside Iran. Further direct exchanges followed later that year.
In June 2025, Israel struck Iranian nuclear, missile and military targets. The confrontation expanded again in 2026, when U.S. and Israeli strikes on Iran began on February 28. By September, the war had damaged Iran's economy, disrupted energy flows and triggered new regional escalations, while negotiations remained stalled.
That evolution matters: the rivalry is no longer only a contest conducted through proxies and covert operations. Direct attacks make escalation faster and harder to contain.
Why the United States is involved
The United States is Israel's most important military and diplomatic partner. Washington also maintains troops, bases and security partnerships across the Middle East, protects major shipping routes and has long sought to prevent Iran from developing a nuclear weapon.
Iranian-backed groups have attacked U.S. personnel and interests, while the United States has imposed sweeping sanctions and carried out military strikes. Tehran argues that U.S. power protects Israel and threatens Iran. Washington argues that Iran's missiles, nuclear activities and armed partners threaten U.S. allies, forces and global trade.
What each side wants
Israel's main objectives
- Prevent Iran from acquiring a nuclear weapon or a rapid path to one.
- Reduce Iran's missile and drone capabilities.
- Break the military power of Hezbollah and other Iranian-backed groups.
- Stop Iran from building military infrastructure near Israel's borders.
Iran's main objectives
- Preserve the Islamic Republic and deter attacks on Iranian territory.
- Maintain influence through regional allies and armed partners.
- End or reduce U.S.-led sanctions.
- Keep a domestic nuclear program while resisting limits Tehran sees as unequal.
- Position itself as the leading regional opponent of Israel and U.S. influence.
Key dates
- 1950: Iran grants Israel de facto recognition under the Shah.
- 1979: The Islamic Revolution ends the partnership and makes opposition to Israel state policy.
- 1982: Iran helps establish Hezbollah during the Lebanon war.
- 2002: Previously undeclared Iranian nuclear facilities become public, intensifying international concern.
- 2015: Iran and world powers sign the JCPOA nuclear agreement.
- 2018: The United States leaves the deal and restores sanctions.
- 2024: Iran and Israel exchange direct attacks on each other's territory.
- 2025: Israel launches major strikes against Iranian nuclear and military targets.
- 2026: U.S.-Israeli strikes begin a wider war with Iran.
Conditions for a lasting settlement
A durable settlement would require agreements on several interconnected issues: Iran's nuclear program, sanctions, missile forces, U.S. military presence, Israeli security and the role of armed groups across the region. The unresolved Israeli-Palestinian conflict also remains central to Iran's political narrative and to regional instability.
A ceasefire could stop immediate attacks, but it would not automatically resolve the deeper rivalry. Without verification mechanisms and political concessions, both sides would still have reasons to prepare for another round.
Israel and Iran sit at the center of overlapping military, energy and trade networks. A wider war can affect oil prices, shipping through the Strait of Hormuz and Red Sea, aviation routes, U.S. forces, Gulf states, Lebanon, Syria, Iraq, Yemen and the lives of millions of civilians.
Sources and further reading: Reuters: Iran and Israel's shadow war; Reuters: timeline of Iran's nuclear dispute; Council on Foreign Relations: Iran conflict tracker; Reuters: September 2026 regional escalation.; IAEA: verification and safeguards activities; IAEA: Additional Protocol; IAEA: Iran safeguards report, 1 September 2026
Last updated: October 24, 2026. CurrentFront distinguishes verified facts from disputed claims and updates explainers as events change.
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