Esther married the Persian ruler and he protected the Jews. Plenty of Jews stayed in the Persian Empire even after being released to go home. Haman is usually identified with Amalek in Jewish tradition. This is an idiotic argument.
"16 All Scripture is breathed out by God and profitable for teaching, for reproof, for correction, and for training in righteousness, 17 that the man of God may be complete, equipped for every good work."