One of his aides told a reporter that gift was meant to provide “background reading” on Iran for Obama. In a speech to the American-Israeli Public Affairs Committee (AIPAC), a pro-Israel lobbying group, Netanyahu described Haman, the villain of the tale, as "a Persian anti-Semite [who] tried to annihilate the Jewish people." The context of his speech was that Iran, the modern successor to Persia, presents the greatest danger to peace and security on the planet.
While I'm not sure foreign policy is well-crafted with ancient biblical texts as a guide, the lessons of the Esther story are taken seriously by Netanyahu and millions of Jews. Some Jewish traditions say Hitler is not a historical aberration, but a descendent of Haman (who, in turn, was a descendant of the Jews' enemies in Egypt). The story of a proposed genocide of the Jews in ancient Persia? Evidence for why the modern state of Israel had to be established – there could be no guaranteed security or safety for Jews living in a Gentile-majority state.
What happened? The Persian king Ahasuerus is displeased with his wife and casts her aside, ordering his men to scour the country for a new bride. The beautiful orphan Esther, being fostered by her cousin Mordechai, is brought before Ahasuerus and he takes her as his wife. Mordechai tells her to keep her Jewish identity a secret.
Some time later, Mordechai overhears a plot against the king and transmits the warning through Esther. But Mordechai's role is unknown and he runs into trouble when some time after that, Haman is elevated to vizier – the king's prime minister and right-hand man. Haman is not a nice man. After Mordechai refuses to bow down before the vain and bullying Haman, the vizier decides to eradicate all Jews in Persia in revenge. With a honeyed tongue in the king's ear warning that Jews are disloyal and dangerous, he wins approval. On a set date, all the Jews in the empire will be slaughtered.