Germans distinguish Jews based on physical characteristics, religion and other aspects.

Jews are Semites and are closer to Arabs in blood. Therefore, Jews have more obvious physical characteristics. The most distinctive feature of Jews is their "Jewish nose." The nose is in the shape of an eagle hook, the tip of the nose is slightly curved, the wings of the nose are thick, and the tip of the nose is drooping. This feature is obviously different from the straight nose of the Germans. Next is the beard. Jews like to keep beards, and they cherish their beards very much and will not easily succumb to violence and shave off their beards. And the forehead. Jews have a higher and wider forehead, a thin face, and a tight chin with an obvious inverted triangle shape. Jews like to wear black clothes, black top hats or small round hats, and some men wear belts around their arms.

Jews have believed in Judaism all their lives. They have built their own fixed churches. They not only gather together regularly to hold ceremonies, but also pray every day. No external force can stop their prayer behavior. These religious behaviors allowed the Germans to identify them very well. As long as they rushed into the synagogue and caught one accurately, they would often pull out the radish and bring out the mud, implicating the entire family. Moreover, each synagogue has detailed information about its believers, and the Germans can easily find them just by following the map.

The Germans will also spread spies among the Jews. These spies may be Germans or Jews. Of course, there are a few Jews who will take the initiative to report the identities of other Jews in order to protect themselves.