Save the cheerleader, save the world!

On March 20, the Jewish holiday of Purim begins. On Purim, people dress up in costumes, engage in raucous fun, sometimes drink too much, and the scroll of the Book of Esther is read, with people cheering every mention of the name Mordecai and booing the name of Haman. The events celebrated are not historical, but this is an important holiday. What can people who
are not celebrating Purim as a member of a Jewish community learn from this holiday?