Esther 3:1, 5-6

After these things happened, King Xerxes honored Haman son of Hammedatha the Agagite. He gave him a new rank that was higher than all the important men.

When Haman saw that Mordecai would not bow down to him or honor him, he became very angry. He thought of himself as too important to try to kill only Mordecai. He had been told who the people of Mordecai were, so he looked for a way to destroy all of Mordecai’s people, the Jews, in all of Xerxes’ kingdom.