Matthew Henry on Esther 3:1-6

Mordecai refused to reverence Haman. The religion of a Jew forbade him to give honours to any mortal man which savoured of idolatry, especially to so wicked a man as Haman. By nature all are idolaters; self is our favourite idol, we are pleased to be treated as if every thing were at our disposal. Though religion by no means destroys good manners, but teaches us to render honour to whom honour is due, yet by a citizen of Zion, not only in his heart, but in his eyes, such a vile person as Haman was, is contemned, Ps 15:4. The true believer cannot obey edicts, or conform to fashions, which break the law of God. He must obey God rather than man, and leave the consequences to him. Haman was full of wrath. His device was inspired by that wicked spirit, who has been a murderer from the beginning; whose enmity to Christ and his church, governs all his children.