Germany's far-right Alternative für Deutschland party adopted its most radical election manifesto yet at a party conference this weekend, setting up a confrontation over the future of Europe's largest economy ahead of federal elections in May.The manifesto, approved by delegates in Riesa, includes proposals that would fundamentally reshape Germany's role in the European Union and its post-war political consensus. With the AfD polling at around 20 percent nationally - second only to the conservative CDU/CSU - mainstream parties are watching with alarm."Brussels decides more than you think," as I often say. And an AfD breakthrough would reshape those Brussels decisions in ways that keep EU commissioners awake at night.What's in the manifestoThe AfD platform includes calls for Germany to reclaim sovereignty from Brussels, with proposals to renegotiate EU treaties or pursue what the party calls "Dexit" - a German exit from the European Union modeled on Brexit. The manifesto also demands the dissolution of the euro, a return to national currencies, and the closure of Germany's borders to asylum seekers.On energy policy, the party wants to restart coal power plants and abandon Germany's renewable energy transition. On foreign policy, it calls for an end to sanctions against Russia and a fundamental rethink of NATO membership.The manifesto represents a hardening of positions the AfD has long held, but never before codified so explicitly in an election platform. Party leader Alice Weidel told delegates the program represented "the real voice of the German people" against what she called the "failing establishment."Why mainstream parties are concernedFor Germany's traditional parties, the AfD's rise poses an existential challenge. The party has moved from fringe protest movement to potential kingmaker - or king - in German politics. While other parties have vowed not to form coalitions with the AfD, its polling strength makes coalition mathematics increasingly difficult."The AfD is no longer just a protest vote," a senior CDU strategist told Politico Europe this week. "They're offering a coherent alternative vision for Germany. It's just a vision that would dismantle everything we've built since 1945."The concern extends far beyond . has been the EU's anchor of stability and integration since the bloc's founding. A German government even partially influenced by AfD positions would fundamentally alter the balance of power in .Here's what British, Nigerian, and American readers need to understand: Germany is not just another EU member state. It's the bloc's largest economy, its most populous nation, and historically its most committed integrationist. When speaks in Brussels, the EU listens.An AfD with significant parliamentary representation - or worse, in government as a coalition partner - would embolden similar parties across Europe. 's Marine Le Pen, 's Matteo Salvini, and others have watched the AfD's rise with interest. A breakthrough in Germany would signal that the post-war European consensus is truly over.The manifesto arrives as the EU faces multiple crises: ongoing tensions with over , trade disputes with and potentially the , and internal divisions over migration and fiscal policy. Germany going wobbly on EU integration would be catastrophic timing.Federal elections are scheduled for May 25. Current polling suggests the CDU/CSU will win the most seats but fall short of a majority. The question is whether they can build a coalition without the AfD - and what concessions other parties might demand.The AfD itself remains isolated, with a preventing it from entering government. But that firewall depends on other parties' willingness to work together - and on the AfD's support not growing further.The manifesto adopted this weekend makes clear what's at stake. This isn't just about German domestic politics. It's about whether the EU's most important member state continues to anchor European integration, or begins to pull away.Brussels decides more than you think. And in May, German voters will decide what Brussels can still decide.