A father and son hang election posters featuring Alice Weidel, co-leader of Alternative for Germany, in Putlitz, Germany before last Sunday's federal elections. Sergey Ponomarev/The New York Times Sunday’s election success didn’t come overnight for Germany’s far-right Alternative for Germany (AfD). It finished second with 20.8 per cent – doubling the size of its Bundestag parliamentary party to 152 seats – after a decade cultivating, and amplifying, public concerns over Germany’s extended political drift, its uncertain economic outlook and the consequences of its decade-old migration policy. With populist claims, punctuated with regular, planned provocations, AfD politicians provide simple, skewed answers...