Iran Summons German Ambassador After Merz Calls on Tehran to End Hormuz Blockade

A Blockade, a Speech, and a Summons

Iran's foreign ministry called in Germany's ambassador, Axel Wilhelm Dittmann, on Thursday, September 17, 2026^[4][5]. The man who delivered the protest was Alireza Yousefi, who runs the ministry's Western Europe desk^[4]. He raised two complaints at once: statements from senior German officials, and what Iran called "interventionist" activity by the German embassy in Tehran^[5]. He also faulted Berlin for its military and political support for Israel^[4].

The summons was a response to something said two days earlier, in another country. On Tuesday, September 15, Chancellor Friedrich Merz stood in Berlin next to Iraq's prime minister, Ali Faleh Al-Zaidi, and told Iran to "finally end this blockade in the Strait of Hormuz" and, "above all," to halt its "military nuclear program"^[1][2]. He added that Iran's support for armed groups across the region "must cease," and urged Tehran not to let the war spread into Iraq^[2].

Iran did not wait long to answer. On Wednesday, spokesman Esmaeil Baghaei said flatly that Iran has "no 'military' nuclear programme" and called Merz's account of the war "knowingly distorted"^[3]. He argued the United States and Israel started the fighting, and said Germany lacked the "moral courage" to say so^[3][11]. A day later, the ambassador was called in.

Both sides in this exchange agree that oil is now more expensive and that ships in the Strait of Hormuz are under fire. Where they split is over who is doing what to whom, and that gap is the whole story.

Why Germany Cares About a Strait 3,600 Miles Away

Start with the thing neither side disputes: the Strait of Hormuz is a genuine chokepoint. Roughly a fifth of all globally traded oil moves through it, according to the U.S. Congressional Research Service^[17]. It is also a chokepoint for Iran itself, since Iranian crude has to cross the same water to reach buyers. That is part of why the pressure over it can't be sustained by either side forever.

Germany's stake is direct. It's a major exporter with almost no oil or gas of its own, so it runs on imported energy and open shipping lanes. Merz has said plainly that the blockade "is hurting our economy"^[15]. Brent crude hovered near $97 a barrel in early September, up about 9% in five days and 19% over the prior month, before futures broke past $100^[8][12]. That's the number behind Merz's urgency — it shows up in German factories, not on a map.

Here's the part that's easy to miss: Germany's position on Iran did not start this week. In August 2025, Germany, France and Britain triggered something called "snapback" — a mechanism written into the 2015 nuclear deal that lets any original party unilaterally reimpose UN sanctions on Iran within 30 days^[13][14]. The key detail is that no permanent Security Council member, not Russia, not China, can veto it once triggered. That sanctions reimposition took effect that September^[13][14]. Merz's demand this week is a continuation of a year-old European position, not a fresh alignment with Washington.

Iran, meanwhile, is fighting an active war with the United States and living under those reimposed sanctions^[13][14]. Its argument is about sequence: it says the U.S. and Israel started this war, and that anything Iran has done in the strait is a response, not an opening move^[3][11]. On the nuclear file, Tehran says the "military program" label is an unproven Israeli characterization being repeated until it sounds settled — no finding cited in this week's coverage establishes it either way^[1][3].

What a Summons Actually Is, and Isn't

It's worth being precise about what happened diplomatically, because the word "summons" can sound bigger than the act. Calling in an ambassador is the cheapest formal protest a government has. It is not a recall of the ambassador, not an expulsion, and not a break in relations — Germany and Iran still run working embassies in each other's capitals^[4][5]. Iran has used this exact tool before, for exactly this kind of grievance.

That framing matters because it sits underneath a real disagreement about intent. Berlin can plausibly say it's continuing a policy that predates this week, built on an economic interest and a multilateral sanctions process it helped design^[13][14][15]. Tehran can plausibly say Germany, by repeating an unproven nuclear claim and backing Israel, has forfeited any standing to lecture Iran, and that a large share of the region's public sees German officials as complicit in the war^[4]. Neither of those is dishonest on its face; they're just aimed at different audiences.

There's also a smaller country caught in the middle of the staging. Iraq's prime minister, Ali Faleh Al-Zaidi, was in Berlin on his first European tour, pitching German investment and floating a possible Iraq-to-Germany pipeline that would move oil overland, through Turkey and Syria, bypassing Hormuz entirely^[10]. Iraq doesn't endorse Iranian strikes on shipping, but it also doesn't want to become the ground where the war widens^[2][10]. Merz noted, in that same appearance, that the mandate for German troops in the anti-ISIS coalition in Iraq runs out at the end of September 2026^[2] — a separate deadline now tangled up with everything else being discussed.

One Word Doing a Lot of Work

There's a translation fight buried in this dispute that's easy to skip past but shouldn't be. Merz said Iran's support for regional armed groups was for "proxies" — a word that implies those groups take orders from Tehran^[2][3]. Some coverage of Iran's rebuttal instead used "regional allies," a phrase that implies partnership between equals, not control^[3]. That's not a stylistic choice. It's the argument itself, compressed into one noun: does Iran command these groups, or does it merely back them?

The U.S. is engaged in the strait directly. Central Command has struck Iranian tankers and says it's working to clear traffic through the waterway; Iran's Revolutionary Guard says it has targeted U.S. Navy vessels and commercial shipping in turn^[8][12]. From Washington's vantage, and in outlets aligned with it, European statements like Merz's read as independent confirmation that the U.S. case is right — which is a large part of why those outlets put Merz's "criticism" in the headline rather than Iran's protest^[6].

Coverage split along familiar lines once the summons happened. Iran's own Press TV led with Germany's "hostile positions" and interventionist activity, giving prominence to a Yousefi charge that German officials are seen as complicit in crimes against Palestinians^[4]. Russia's TASS foregrounded the sovereignty complaint over the Hormuz dispute^[5]. Israel National News framed the story as Iran reacting to legitimate "criticism," which assumes the criticism was accurate^[6]. Turkish state broadcaster TRT World and Turkey's A News reported the summons in more neutral terms, largely centering Merz's quotes without editorializing^[1][9]. Al Jazeera skipped the culpability question almost entirely and covered the strait mostly as a market story about oil prices^[8].

What's Actually Being Absorbed, and by Whom

The economic picture underneath all of this is more mixed than either side's talking points suggest. German forecasters raised their growth outlook in early September, citing strong exports and a smaller-than-feared hit from the war; the Halle Institute now projects 1.4% growth for Germany in 2026 and 0.8% in 2027^[16]. That's the number Merz can point to as proof Germany is managing the disruption.

But that forecast was made while the strait is still contested, so it assumes the damage doesn't get worse^[8][12][16]. Oil above $100 a barrel is a cost still working its way through supply chains, not a settled bill. Iran, for its part, has to sell its own oil through the same waterway it's accused of blockading, which means the leverage it's using is also its biggest financial exposure.

None of that is changed by which ambassador got called into which ministry this week. What the summons does confirm is that the argument over Hormuz, the nuclear file, and who bears responsibility for the war has moved fully into Europe's diplomacy, not just Washington's. Whether Berlin's economic confidence holds if the strait stays disrupted longer, and whether Iran's denial on the nuclear question changes anything at the negotiating table, are both still open.