In January 2011, Tunisia removed its dictator. Not through a coup or foreign intervention, but through the accumulated fury of ordinary people who had simply had enough. For a few weeks, the world watched a country improvise its way toward freedom.

Then the exiles came home.

When Rached Ghannouchi, leader of the Islamist movement Ennahdha, landed in Tunis, thousands chanted the hymn traditionally sung to welcome the Prophet Mohammed to Medina. A revolution that belonged to every citizen, suddenly claimed.

Ennahdha swept the elections. Calibrated rhetoric, reassuring promises, then the slow hoarding of every real lever of power. A decade later, when emergency powers dissolved the parliament, the public reacted not with outrage but relief. The movement that once filled an airport with hymns could barely fill a room with defenders.

What happened was not a political correction. It was an immunological event.

The most effective way to make a population resistant to an ideology is not to censor it, which creates martyrs, or prohibit it, which breeds mystique. It is to give it a platform. When a movement reaches power, the inoculation is total. No counter-campaign can replicate the moment a believer watches their leaders behave exactly like the establishment they promised to replace.

This is the social vaccine. Expose a population to the pathogen under conditions where the damage can be survived, and the immune response develops on its own. It happened in Tunisia. It happened across Europe’s far-right municipalities and in Latin America, wherever populist movements discovered that governing means waste collection, school budgets, and the patronage networks they had promised to destroy.

In 2015, Germany opened its doors to Syrian and Libyan refugees. The gesture was framed as moral leadership. The conditions that followed were not.1 In Burbach, video surfaced of security guards physically abusing residents; a photograph showed a guard with his foot on a man’s neck. Asylum decisions took ten to twelve months on average, and until that decision arrived, refugees could not legally work. In 2016, the government downgraded Syrian protection status from full refugee recognition to subsidiary protection, which triggered the suspension of family reunification. Families were separated for years—not by accident but by the interaction of two policy changes enacted within months of each other. What nightly broadcasts showed was the visible result: overwhelmed municipalities, idle young men, incidents that confirmed every fear. What they did not show was that the idleness was legally enforced, the overcrowding a matter of allocation policy, and the isolation a product of a quota formula. The image that fixed itself in the public mind was of people who could not integrate. Whether they had been given the means to was not part of the conversation. “Refugees welcome” became, in practice, the slogan that ensured Muslim refugees would never be welcome again.

There is a reading of all this as poor planning under extreme pressure. That reading becomes harder to sustain once you place 2015 next to three other facts.

The first is Tunisia. During a joint press conference, Angela Merkel pressed Prime Minister Youssef Chahed: his country should take more refugees. Chahed replied that his young democracy had already absorbed over two million Libyans, at enormous cost. Germany, population eighty million, treated one million asylum seekers as a continental crisis. Tunisia, population eleven million, absorbed nearly twenty percent of its own population without the spectacle.

The second is Ukraine. In 2022, the same states that had warehoused Syrians in gymnasiums for years provided Ukrainian refugees with apartments within weeks. Work permits overnight. Children enrolled in schools immediately. The European Union invoked the Temporary Protection Directive, bypassing the asylum bureaucracies that everyone had insisted were simply how the system worked.

The third is the refugees themselves. By 2025, sixty-four percent of Syrian refugees in Germany were employed—approaching the national average and filling critical gaps in an aging economy. Over 160,000 had taken German citizenship. Crime statistics showed no meaningful divergence from the native-born population. The crisis of 2015 was never about the people who arrived. But by the time the data showed this, the image had already set. The antibodies were circulating.

The conditions of 2015 were not a given. And the outcome, whatever its cause, was a European public inoculated against future Muslim immigration.

To understand why that inoculation might matter, it helps to look at a calendar.

In 2003, the invasion of Iraq displaced over four million people. In 2001 and the years that followed, the war in Afghanistan uprooted millions more. In 2011, the NATO intervention in Libya collapsed the state entirely. That same year, the Syrian civil war began producing what would become the largest refugee crisis since World War II. Each of these conflicts involved Western military action in a Muslim-majority country, and each was followed, eventually, by the next.

By 2015, the pattern had been running for over a decade. The question is not whether anyone in Brussels or Berlin could see it. The question is whether anyone could have failed to.

Now the sequence continues. Iran is under direct attack. Strikes are hitting cities and infrastructure. EU officials warn that even ten percent displacement from Iran’s ninety million people could create flows dwarfing anything seen before.

The European response: no welcome programs. No humanitarian corridors. No “Wir schaffen das.” Stricter border checks, deals with Turkey, regional aid designed to keep people close to the conflict. The language from Brussels: “We cannot have what we had ten years ago.” Not: we will do it properly this time. Simply: never again.

The antibodies are shaping policy before the first Iranian refugee has arrived. And the states closing their doors are, in several cases, the same ones whose military commitments helped produce the displacement they are bracing against.

None of this delivers a verdict. It is possible that 2015 was a genuine failure of logistics, that the difference with Ukraine reflects only the speed of institutional learning, and that the pattern of intervention followed by displacement followed by closed doors is a series of unrelated decisions that happen to form a line.

It is also possible that a sequence this consistent, producing outcomes this convenient, deserves more scrutiny than it has received. That someone, somewhere in the briefing rooms, understood that the flood was coming; understood, in part, because they were helping to cause it; and made a calculation about what kind of public would be needed when it arrived. The essay is not the place to resolve that question. The evidence is the place to begin asking it.

  1. Refugees were housed in repurposed gymnasiums, emergency tents, and disused army barracks—many in isolated villages selected by a quota formula based on tax revenue, with no consideration of where jobs, language courses, or communities might help someone build a life. Heating systems in the tents did not work. Dozens of people shared a single bathroom. Germany’s established 600-hour integration courses were overwhelmed; the replacement programme offered 320 hours, no curriculum, and no certification. Healthcare was legally restricted to emergencies for the first eighteen months.Â