“Death to America is not a slogan; it is a policy. “These words are more than rhetoric, as Khamenei, the eliminated leader of the Iranian regime, has repeated them since 2023. When people think about Iran and the United States, they usually focus on the nuclear file or occasional flare‑ups in the Persian Gulf. But the deeper, structural problem is simpler: for more than four decades, a revolutionary, anti-American regime has controlled one of the world’s major oil exporters—and systematically converted those petrodollars into terrorism, proxy warfare, and leverage over global energy.
At least 603 U.S. troops were killed by Iranian‑backed militias in Iraq between 2003 and 2011, and since 2022 Iran and its proxies have killed at least 51 additional Americans, including soldiers, contractors, and civilians, in Iraq, Syria, Jordan, and Israel.
In other words, Iran is a threat not just for its expansion and terror policies but for its cash flow.
From “Great Satan” to Global Proxy Network
The Islamic Republic that emerged in 1979 made hostility to the United States part of its identity, branding Washington the “Great Satan” and building parallel power structures to export the regime. Central among these is the Islamic Revolutionary Guard Corps (IRGC) and its external arm, the Qods Force, which manages a web of militias and terror groups stretching from Lebanon and Syria to Iraq and Yemen.
U.S. designations as far back as 2007 already tied the IRGC and Qods Force to terrorist activity, proliferation, and support for groups like the Taliban and Hezbollah. More recent assessments continue to describe Iran as a leading state sponsor of terrorism and a long-term threat to U.S. interests and personnel in the Middle East.
The crucial enabler of all of this is energy income.
Oil Revenues: The Regime’s Lifeblood
Oil and gas exports have long provided a large share of Iran’s export and budget revenues, often exceeding 40 per cent recently. These are not normal, transparent fiscal flows. Security institutions, especially the IRGC, receive direct allocations of crude and petrochemical products they can sell through opaque networks, keeping the proceeds off-budget.
Investigations show how Iranian security agencies receive oil cargoes or fuel allocations to smuggle or “launder” through third countries like Iraq, generating hundreds of millions or even billions of dollars a year in hard currency that can be spent on regional partners and foreign procurement. U.S. Treasury designations identify extensive fleets of ships and shell companies that disguise crude oil of Iranian origin and channel the proceeds to the Qods Force and allied militias.
During periods of weak enforcement or high prices, this revenue windfall becomes obvious. Recent reporting suggests Iran has been earning on the order of $140 million a day from oil exports in the current high‑price environment, despite formal U.S. sanctions. Those dollars do not stay in the civilian economy; they give the regime fiscal breathing room and expand its capacity to fund proxies and repression.
How Oil Money Translates into Terrorism
What does this mean in practice? U.S. and independent estimates point to hundreds of millions of dollars a year flowing from Tehran to Hezbollah in Lebanon, Hamas and other factions in Gaza, Shiite militias in Iraq, and the Houthis in Yemen.
- Hezbollah has evolved into a heavily armed hybrid army on Israel’s border, with a missile and rocket arsenal that directly threatens a key U.S. ally and U.S. interests.
- Hamas and other Gaza groups supported by Iran have triggered conflicts that repeatedly drag in Washington diplomatically and militarily.
- Iraqi militias backed by Iran exploit Iraq’s oil sector and smuggling schemes as a fundraising and sanctions-busting hub, providing “billions of dollars of illicit value each year” to the Iran threat network.
- The Houthis have disrupted trade routes and oil flows by attacking commercial shipping and threatening Gulf energy infrastructure, a task the U.S. Navy is responsible for maintaining.
From Washington’s perspective, every extra billion in Iranian oil or petrochemical exports potentially translates into more rockets in southern Lebanon, more drones over Red Sea shipping lanes, and more risk for American troops and diplomats in the region.
Why This Hits the U.S. Economy
The threat is not only political; it is macroeconomic.
First, Iran sits at the mouth of the Strait of Hormuz, through which roughly a fifth of globally traded oil passes. Every time Tehran harasses tankers or hints at closure, markets react. The 2025 Iran–Israel escalation saw Brent crude jump as traders priced in the risk of wider conflict and supply disruption.
Second, sanctions policy itself has economic consequences. When US enforcement is strict, Iran’s official oil export revenues can collapse—from tens of billions a year to low single-digit billions—limiting the regime’s resources and increasing domestic pressure. However, the Iranian regime’s use of Chinese and Russian financial systems helps it keep a vast network of terrorism and propaganda financing, aimed at sabotaging the US and Western systems, which allows it to circumvent sanctions and maintain its influence despite reduced oil revenues.
Third, the broader instability created by Iran’s proxy network raises risk premia on Middle Eastern assets and shipping, impacts insurance costs, and injects uncertainty into corporate investment decisions across the region. For a U.S. The economy is deeply integrated into global capital and energy markets, and that uncertainty itself represents a cost.
A Structural, Not Cyclical, Threat
The uncomfortable conclusion is that as long as a radicalised, anti-American regime controls substantial hydrocarbon revenues and a proven network of terrorist and proxy partners, Iran will remain a structural threat to U.S. national security and economic stability. Nuclear talks or temporary ceasefires can dampen specific risks, but they do not change the underlying model: turn oil and petrochemicals into US dollars, and turn hard currency into terror financing, rockets, drones, and militias.
For policymakers, investors, and ordinary citizens, understanding that link—from the oil well to the militia payroll—is essential to making sense of why Iran matters far beyond its borders.