A mysterious campaign in Berlin to stoke fears of "Jewish terror" is spreading and becoming increasingly sophisticated. According to a report by the Department of Research and Information on Anti-Semitism (RIAS), flyers, cards, and notices warning of "Jewish terror" threatening "attacks on Berlin's citizens" have increased around the city since October of 2015. [...] While the campaign initially appeared to be limited to the spreading of propaganda, it now appears to be actively tracking Jews living in Berlin. ...