"A copy of the text of the edict was to be issued as law in every province and made known to the people of every nationality so they would be ready for that day." NIV translation
Haman was determined to get maximum involvement of all people in his plan to kill the Jews. It was about eleven months between the time the secretaries were gathered to draft the law and the date for it to happen. Throughout the Bible, the number eleven is associated with chaos and disorder and that is what Haman had planned but it was disguised as a way of keeping order in the kingdom. We are told, in James 3, that this disorder does not come from God but is of Satan. Satan hates all of God's people and that is the root of all anti-semitism.
"Spurred on by the king's command, the couriers went out, and the edict was issued in the citadel of Susa. The king and Haman sat down to drink, but the city of Susa was bewildered." NIV translation
So the law went out to all of the lands as well as being posted in the capital city. Haman and the king celebrated but the common city people did not understand why the order was issued.
Though it may seem like the darkest of times for God's people and that the enemies are rejoicing, we must know that God is at work behind the scenes and the celebration of the evil will end. God is still in control and that applies to our lives today as well.