Iran's New Supreme Leader Declares US Enemy of All Islam — What Comes Next

A Statement With Strategic Teeth

Iran’s Supreme Leader Mojtaba Khamenei did not mince words on August 30. Issued on the birthday of the Prophet Muhammad — a date chosen deliberately to maximize religious resonance — his statement declared the United States and Israel “enemies of all Islam.” The target was unmistakable: Gulf monarchies hosting American military bases, and their leadership circles.

This is not routine rhetorical fire. Mojtaba Khamenei is a man who assumed the role of Supreme Leader on March 9, 2026, just days after his father Ayatollah Ali Khamenei was reported killed in the US-Israel airstrike on Tehran on February 28. He is a hardline anti-American conservative with no track record of diplomatic accommodation. His first major public address to the Islamic world frames Washington not as a regional adversary but as an existential threat to the faith itself.

That framing is a strategic gift to Tehran and a strategic problem for every Gulf capital.

The Direct Target: Gulf States With US Bases

Mojtaba Khamenei specifically called out “leaders of Islamic countries considered collaborators” with the US and Israel — a clear reference to the UAE, Bahrain, Saudi Arabia, Qatar, and potentially Oman. These are states that host US military installations, participate in American-led security architectures, and have, in varying degrees, normalized relations with Israel.

The statement went further. It accused Washington and Jerusalem of deliberately sowing division among Islamic nations and called for unity across the Muslim world. That language — unity against a common enemy — is precisely the kind of appeal that resonates with Shia communities across the Gulf, particularly in Bahrain and eastern Saudi Arabia, where sectarian grievances can be reignited by external religious authority.

For the UAE, which has staked much of its recent foreign policy on deepening ties with both Washington and Israel while managing a delicate relationship with Tehran, this is awkward pressure. For Saudi Arabia, which has been quietly recalibrating its security posture away from sole dependence on the United States, the statement adds moral weight to arguments for strategic autonomy.

The Financial Front: Sanctions, Shadows, and Spillover

While Mojtaba Khamenei was making his declaration, a parallel development was unfolding in the financial domain — one with immediate regional implications.

On August 29, the UAE’s central bank announced it was launching an “special and urgent investigation” into the UAE branch of Egypt’s Misr Bank. The branch had been sanctioned by the Trump administration on August 28 for facilitating approximately $1.8 billion in transactions with more than 100 Iranian shadow banking entities between January 2024 and June 2026.

This is significant on two levels. First, it demonstrates that US financial sanctions against Iran are expanding beyond direct Iranian institutions to third-country banks — including those in allied Gulf states. Second, it puts the UAE in an uncomfortable position: it is simultaneously being pressured by Washington to cut off Iranian financial channels and being publicly rebuked by Tehran’s supreme leader for hosting US bases.

Egypt’s Misr Bank, one of the country’s largest lenders, now faces an investigation initiated by its own host government. The move signals that the UAE will comply with US sanctions demands even when it creates diplomatic friction with regional partners. But it also suggests that no Gulf bank is immune from secondary sanctions scrutiny — a reality that will make every financial institution in the region pause before processing transactions that might touch Iranian counterparties.

Who Wins, Who Loses

Tehran wins in the short term by shifting the overton window. A supreme leader who rose to power amid war now frames the conflict in civilizational terms rather than geopolitical ones. That makes compromise more difficult for any Gulf leader who wants to maintain credibility at home — especially among populist and religious constituencies.

The Gulf states lose flexibility. Every statement from Washington or Jerusalem now carries more weight in Tehran’s narrative, and every security cooperation agreement with the US becomes harder to justify to domestic audiences without appearing to betray the Islamic world. The UAE already walked a tightrope; now the rope has moved.

Saudi Arabia is the most consequential loser. Its Vision 2030 project depends on regional stability and diversifying away from oil. An Iran that successfully frames the conflict as a broader civilizational struggle makes Saudi normalization efforts with Israel and security accommodations with the US far more politically costly at home and across the Arab world.

What Comes Next

The immediate question is whether other Gulf financial institutions will find themselves under similar US sanction scrutiny. The Misr Bank case sets a precedent: being a US ally does not shield you from secondary sanctions enforcement. Expect more investigations, more compliance pressure, and more anxious conversations in Abu Dhabi, Riyadh, and Doha.

On the rhetorical front, watch for whether the statement triggers concrete action — protests, political pressure, or policy shifts — in Gulf states with significant Shia populations. Bahrain’s Shia majority and Saudi Arabia’s Eastern Province are the most likely flashpoints.

There is also a longer-term calculation at play. Mojtaba Khamenei’s statement arrives six months after the US-Israel strike on Iran, a conflict that Nikkei has described as leaving the Trump administration at a strategic crossroads. Tehran appears to be betting that ideological framing can compensate for military disadvantage — that by turning the conflict into a broader Islamic cause, it can constrain its adversaries’ options and rally domestic and regional support.

Whether that bet pays off depends on how Gulf governments respond. The states most vulnerable to this framing are those that have invested most heavily in the American security umbrella. The ones that have already been hedging — the UAE above all — may find that Mojtaba Khamenei’s declaration, however provocative, simply accelerates choices they were already considering.