K-pop’s Third Reich fashions are a first-rate flop. Purple Kiss, a popular all-girl group from South Korea, is embroiled in the latest example of an ongoing campaign to trivialize Nazi symbolism in order to shock and awe — and cash in, according to human rights groups taking the multibillion-dollar K-pop industry to task for what they claim are deliberately inflammatory machinations. After the group’s label, Rainbow Bridge World (RWB), released promo photos for its holiday merch, one band member, Goeun, incited backlash for sporting what looked like a Parteiadler — a Nazi insignia depicting an eagle with outstretched wings above...