Haman said: Yeshno Am Echad, Mefuzar U’Meforad Bein HaAmim.
Some take this a chiyuv to make yidden “Mefuzar U’Meforad” by causing pirud and sinas yisroel from within.
I guess they are at Ad Dlo Yada – they don’t know that it Haman is the one that is Orur. It is a curse mission that impacts them and their loved ones negatively – r”l, Hashem ya’azor.