Across Hungary, George Soros’s aged face dominates bus stops, pedestrian pathways, and major intersections with the cryptic message, “Don’t let Soros have the last laugh.” Last laugh? A tag line explained the allusion: “99% reject illegal immigration.” The anti-Soros ad campaign conflates the controversial financier’s investments in leftwing political causes, including open borders, with the European Union’s ongoing effort to force Hungary and other EU countries to accept an annual quota of illegal immigrants. To redistribute hundreds of thousands of people who arrived in Italy and Greece in 2015, the EU assigned each member state a compulsory number: 1,294 for...