German President Frank-Walter Steinmeier has delivered an unusually blunt rebuke of US President Donald Trump’s foreign policy, labelling the Iran war a “disastrous mistake” and a breach of international law.
Speaking on Tuesday, he warned the conflict marked a rupture for German ties with its biggest post-war ally.
In a scathing verbal attack, Mr Steinmeier, whose largely ceremonial role allows him to speak more freely than politicians, took a far more critical line than Chancellor Friedrich Merz, who has skirted questions on the war’s legality.
“Our foreign policy does not become more convincing just because we do not call a breach of international law a breach of international law,” the former foreign minister from the centre-left Social Democratic Party said in a speech at the foreign ministry.
“We must address this with regard to the war in Iran. For, in my view, this war is contrary to international law,” he added, expressing little doubt that the justification of an imminent attack on US targets did not hold water.
Calling the war unnecessary and a “politically disastrous mistake”, Mr Steinmeier said US President Trump‘s second term marked a rupture in German foreign relations as profound as Russia’s invasion of Ukraine.
“Just as I believe there will be no going back in relations with Russia to before February 24, 2022, so too do I believe there will be no going back in transatlantic relations to before January 20, 2025,” said Steinmeier.
Germany had to apply lessons it learned in extricating itself from “excessive dependencies” on Russia and apply them to the US, particularly in defence and technology, which translate to power, he said.
Germany has stressed the importance of creating alternatives to US-dominated technology as concerns grow over US access.
China returned to being Germany’s top trading partner in the first eight months of 2025, overtaking the US as higher tariffs weighed on German exports. Trade between the US and Germany amounted to more than 163 billion euros ($190 billion) over that period.
The recent spat between the Pentagon and Anthropic over safety guardrails surrounding the latter’s artificial intelligence could be a wake-up call, or even an opportunity, for Europe, said Steinmeier.
“Europe as a technology hub has talent, markets, opportunities and, importantly, ethical standards. We should build on these,” he said.