"Remember what Amalek did to you" (Deuteronomy 25:17). God remembers the righteous for good and the wicked for destruction. When He recalled Abraham, He spoke with affection: "Shall I hide from Abraham what I am about to do?" (Genesis 18:17). But when He recalled Amalek, He wrote it down as a commandment to obliterate: "I will utterly blot out the remembrance of Amalek from under heaven" (Exodus 17:14).
Rabbi Tanchuma taught: God said to Israel, "Do not be like a horse or a mule that has no understanding" (Psalms 32:9). A horse kicks the hand that feeds it. Israel must be wiser. When you enter the land, remember who treated you well and who struck you down. "You shall not abhor an Edomite, for he is your brother. You shall not abhor an Egyptian, for you were a stranger in his land" (Deuteronomy 23:8). But Amalek? Amalek ambushed the weakest at the rear of the march. Amalek earns no mercy.
The sins of Esau, Amalek's ancestor, cascaded through generations. He scorned the birthright. He sold it for a bowl of lentils, saying, "I am about to die, so what use is a birthright to me?" (Genesis 25:32). He plotted to murder Jacob (Genesis 27:41). He drove Jacob into twenty-two years of exile. His descendants burned the Torah, razed the Temple, and scattered Israel across the earth.
God told Israel: if you fail to remember Amalek each year, I will return you to the slavery of Egypt, to clay and bricks. Joshua defeated Amalek with the edge of the sword (Exodus 17:13), but the root was not torn out. God promised: from the tribe of Benjamin, a king named Saul would rise to finish the work. Memory is not nostalgia in this tradition. It is a weapon, and forgetting is surrender.