CHEMNITZ, Germany — A fierce debate has erupted in Germany around a neo-Nazi provocateur who was ordered to serve time in a women’s prison after legally changing gender, and has now not shown up to serve the sentence. Marla-Svenja Liebich, 54, was until recently a man who went by the name of Sven. Liebich was a high-profile figure in eastern Germany’s right-wing extremist scene for decades and used to be a member of the banned Blood and Honour group, according to German media reports. He also ran a business that sold products online that are popular with xenophobic groups, including...