Matthew Poole and continuators on Esther 3:6

6 And he thought scorn to lay hands on Mordecai alone; for they had shewed him the people of Mordecai▪ wherefore Haman sought to destroy all the Jews , that were throughout the whole kingdom of Ahasuerus, even the people of Mordecai.

He thought that particular vengeance was unsuitable to his quality, and to the greatness of the injury.

Which he attempted, partly from that implacable hatred, which, as an Amalekite, he had against them: partly from his rage against Mordecai: and partly from Mordecai's reason of this contempt, because he was a Iew, which as he truly judged, extended itself to all the Jews, and would equally ingage them all in the same neglect and hatred of his person.