Vienna: The suggestion by Russia’s foreign minister that Adolf Hitler had Jewish blood is the latest version of a conspiracy theory exploiting differences in the dictator’s lineage. Sergei Lavrov’s remarks over the weekend, which have sparked a diplomatic dispute with Israel, rekindled rumors about the identity of Hitler’s maternal grandfather who were dating back to the 1920s. Austrian historian Roman Sandgruber told AFP that Hitler’s father, Alois, was an illegitimate child whose own father was unknown. Sandgruber, who published the first biography of Alois Hitler last year, pointed out that rumors first began to circulate in the 1920s, when Adolf...