In Heidenau, a town near Dresden with a population under 17,000, the center-right CDU and far-right AfD voted together to ban the installation of new Stolpersteine — the small brass-topped memorial plaques embedded in German streets bearing the names of Holocaust victims. The stated rationale: passersby might step on the names. The proposed alternative: relocate remembrance to a cemetery, out of daily sight. The Stolpersteine project, begun by artist Gunter Demnig in the early 1990s, now comprises 128,000 memorial stones in 31 countries. They are the world's largest decentralized monument. Their entire design logic depends on placement at the last known address of the victim — visible, unavoidable, woven into everyday life. Moving them to cemeteries doesn't preserve the memorial in a different form; it negates the memorial's mechanism entirely. Demnig, now 78, was unsurprised. "After the electoral successes of the AfD, something like this was completely expected," he told DPA. He also took direct aim at the CDU, suggesting the party "should maybe drop the C" from its name "because they have dropped Christianity already." He pledged to continue his work "now more than ever." The political significance runs far beyond a single town council vote. Germany's mainstream parties have maintained what they call a "firewall" — a commitment not to govern with or pass legislation alongside the AfD. The Heidenau vote is a local breach, but it arrives at the worst possible moment for Chancellor Friedrich Merz, whose CDU is already managing a political crisis over poor electoral performance. Every local CDU chapter that cooperates with the AfD makes the next cooperation easier to justify. Responses were sharp. Green Party co-leader Felix Banaszak called it "a scandal." The International Auschwitz Committee's executive vice president Christoph Heubner described it as "a transparent and despicable attempt to drive Nazi victims in Heidenau out of the city once again and dispose of them where, according to the AfD, their memory has belonged a long time ago — at the cemetery." The extraction here is not financial — it is democratic. The AfD's strategy is not primarily about winning votes on this specific issue. It is about getting mainstream parties to adopt far-right framing as their own, laundering radical positions into procedural normalcy. The CDU in Heidenau did not merely vote with the AfD; it provided the legitimacy the AfD cannot generate alone. The beneficiary is the AfD's long-term normalization project. The cost is borne by democratic culture, historical memory, and the CDU's own stated principles. What makes this structurally dangerous is the ratchet. Each cooperation lowers the threshold for the next. The "firewall" is not a physical structure; it is a norm, and norms erode one exception at a time. Heidenau is small, but the mechanism scales.