The German Tourists: "That's Him, Stop Him, (etc. etc.)"
In the 1976 film, "The Marathon Man" starring Dustin Hoffman and Sir Laurence Olivier, there is a scene late in the movie that appears to be the basis for a scene in this Seinfeld episode. In "The Marathon Man", Olivier's character is recognized by New York Jewish immigrants as having been a Nazi torturer in a concentration camp in WWII. They follow him as he hurries along a New York City sidewalk and call for him to stop, crying his name out. I feel almost sure this scene is the inspiration for the Seinfeld scene where the German tourists chase Kramer down the streeet as he carries what they believe to be a stolen record player. They're calling out for someone to stop Kramer because, having seen him pull a fake hold-up on George, they think he's a criminal.