The Star of David is a Jewish symbol, a six pointed star, signifying God as the protector of David. It symbolizes the union of heaven and earth, with God reaching down to man and man reaching up to God. It also gained exposure among medieval Jewish mystics, who attached magical powers to King David's Shield.
The Nazi picked up the Star of David because the Jewish adopted this symbol in the 19th century as a striking and simple emblem of Judaism in imitation to the Christian cross. The yellow badge that Jews were forced to wear in Nazi-occupied Europe invested the Star of David with a symbolism indicating martyrdom and heroism. This was also used as a psychological tactic focused at isolating and dehumanizing the Jews of Europe, marking them as inferior to everyone else.
