Esther 3:5 - Joseph Benson’s Commentary on the Old and New Testaments

Then was Haman full of rage Josephus tells us, that Haman, taking notice of this singularity in Mordecai, asked him what countryman he was, and finding him to be a Jew, broke out into a violent exclamation at his insolence, and in his rage formed the desperate resolution, not only to be revenged on Mordecai, but to destroy the whole race of the Jews; well remembering that his ancestors, the Amalekites, had been formerly driven out of their country, and almost exterminated by the Jews.