A headscarf tears at the “brotherhood”: why Turkey and Azerbaijan suddenly fell out

For three decades, Ankara and Baku have described themselves with a single slogan: “one nation, two states.” Turkey and Azerbaijan share a Turkic language and culture, a reading of history, an energy corridor and a defence relationship that was sealed in blood during the 2020 Karabakh war. Turkey is Azerbaijan’s most important strategic ally. Yet in the autumn of 2026 the two governments slid into their most unusual diplomatic chill in a generation — and the spark was a piece of cloth.

A dress code that said nothing about headscarves

On 21 September 2026, Azerbaijan’s Cabinet of Ministers approved amended dress rules for public general-education schools. The text never mentions the hijab. It bans clothing and accessories that do not match the approved uniform or that are deemed to breach the secular character of state education. The rules took effect on 12 October. Within days, videos circulated of headscarved girls being turned away at school gates, and later of teachers who cover their hair being affected as well.

The footage travelled fast — first across Azerbaijani social media, then into Turkey’s. According to Reuters, cited in the original article, Azerbaijan’s Interior Ministry announced 37 arrests linked to protests against the measures.

Azerbaijan is a Muslim-majority country with a large Shia population, but it has been constitutionally secular since independence. Turkey, under President Recep Tayyip Erdoğan, is governed by a religiously conservative movement whose own political identity was forged in the fight against Turkey’s old headscarf bans. The collision was almost scripted.

Secularism, or how it is applied

Dr. Mouzahem’s argument is that the problem is not secularism itself but the way it is being applied. Article 18 of Azerbaijan’s constitution makes the state and public education secular; Article 48 guarantees freedom of conscience and belief. State neutrality, he writes, is meant to protect citizens from the state imposing religion — not to become a reason to restrict what citizens may wear.

He also addresses a claim that spread widely online: that Jewish pupils may wear the kippah while Muslim girls are barred from the headscarf. The article treats this as an unverified social-media allegation rather than documented institutional discrimination, while noting that Azerbaijan’s Jewish community has every right to practise its faith in its religious and communal life.

From Ankara’s advisers to Baku’s ruling party

The row became a state-to-state affair when Oktay Saral, an adviser to President Erdoğan, called the exclusion of headscarved students unacceptable and asked Baku to reverse course. The ruling New Azerbaijan Party answered bluntly: this was interference in a sovereign matter, and education policy is decided in Baku.

What followed went well beyond words. After the dispute escalated, Azerbaijan barred 31 prominent Turkish figures from entering the country — among them Fatih Erbakan, leader of the New Welfare Party, and several journalists close to Turkey’s governing party — and issued international arrest warrants for seven Turkish citizens accused of inciting the overthrow of the Azerbaijani government.

The Israel fault line

The headscarf exposed a deeper divergence. Since the Gaza war began, Turkey has taken a hard diplomatic and economic line against Israel. Azerbaijan has moved the other way: it buys advanced Israeli military equipment, is one of Israel’s most important oil suppliers and maintains close strategic ties with it — a relationship Turkish conservative media have attacked with growing frequency.

The symbol of the split came at an international conference in Baku, when Turkish Foreign Minister Hakan Fidan walked out during a speech by Israeli President Isaac Herzog. In the author’s reading, that image — Turkey’s top diplomat leaving the room in Azerbaijan’s capital while Azerbaijan’s guest spoke — captured the distance that has opened between the two “brother” states.

A different Azerbaijan

Part of the explanation is that Azerbaijan is no longer the junior partner of the 1990s. Between 2020 and 2023 it regained control of Nagorno-Karabakh by force. Its gas now flows to Europe through the Trans-Anatolian pipeline (TANAP) and beyond, and its diplomatic weight has grown with its export revenues. President Ilham Aliyev, the article argues, sees his country as an independent regional power — not a small state in need of Turkish protection, and not one that will accept lectures from Ankara on its domestic affairs.

Armenia and the corridor

The two capitals are also drifting apart on Armenia. For years they moved in lockstep on Karabakh. Now Turkey wants faster normalisation with Yerevan — for trade, transport links and wider regional influence. Baku insists that Ankara should not normalise unilaterally before a comprehensive Azerbaijan–Armenia peace agreement is signed, and it attaches particular importance to the Zangezur corridor that would link mainland Azerbaijan to its Nakhchivan exclave through Armenian territory.

The empty chair in Ankara

The clearest signal of all came on 30 October 2026. President Aliyev did not attend the summit of the Organization of Turkic States in Ankara, despite a personal invitation from Erdoğan; Foreign Minister Jeyhun Bayramov represented Azerbaijan instead. Erdoğan subsequently replaced Saral, the adviser whose remarks had lit the fuse — a gesture meant to lower the temperature. The relationship, the article notes, remains visibly cool.

Rupture, or recalibration?

Dr. Mouzahem does not expect a full break. The energy, security and economic ties — TANAP, joint defence contracts, shared interests in the South Caucasus and Central Asia — are too dense for either side to walk away from. But he argues that the romance of “one nation, two states” has given way to something more transactional: a strategic partnership between two states that increasingly negotiate as equals and disagree in public.

The question he leaves open is whether Ankara and Baku can build a genuinely equal relationship on those terms — or whether a headscarf has revealed that the brotherhood was always more slogan than structure.

Dr. Haytham Mouzahem is a Lebanese researcher on Middle Eastern and Asian affairs and the founding director of the Centre for Asian & Chinese Studies (CACSR), Silk Road’s Arabic sister publication.

Original publication: Wen Wei Po, Hong Kong, 8 November 2026 — wenweipo.com. Cover photo: Presidents Erdoğan and Aliyev sign the Shusha Declaration on allied relations, June 2021 — Presidential Press and Information Office of Azerbaijan, via Wikimedia Commons, CC BY 4.0.