Planeloads of Protestants have been visiting Germany in the year leading up to Oct. 31. On that date in 1517 Luther reportedly nailed his 95 theses — or objections to Catholic practices — to the Castle Church door in Wittenberg, sparking the Reformation.
Terrorists seek to terrorize. The Berlin attack was staged when the most people would be in the market during one of the central holidays of the Christmas tradition. The Ankara attack was staged when the cameras would be rolling and the largest audience would see the murder.