"The Jews struck down all their enemies with the sword, killing and destroying them, and they did what they pleased to those who hated them. In the citadel of Susa, the Jews killed five hundred men. They also killed Parshandatha, Dalphon, Aspatha, Poratha, Adalia, Aridatha, Parmashta, Arisai, Aridai and Vaizatha, the ten sons of Haman son of Hammedatha, the enemy of the Jews. But they did not lay their hands on the plunder." NIV translation
In the capital city, the Jews also killed all of the sons of the man who had intended to kill the Jews. We notice that they did not do it for treasure as they did not take plunder. We must assume that this was an attempt to stamp out anti-Semitism (hatred of the Jews) but it is still alive even to this day.