Final answer:
The opening of the door during the seder symbolizes the historical event when the Angel of Death passed over the homes of the Jewish people who had marked their doors with a red mark during the final plague in Egypt.
Step-by-step explanation:
The opening of the door during the Passover seder symbolizes the historical event when the Angel of Death passed over the homes of the Jewish people who had marked their doors with a red mark to spare their children during the final plague in Egypt.
This story is narrated during the Passover seder, a ceremonial meal that marks the beginning of the holiday. The opening of the door is done during the seder to symbolize the freedom and liberation of the Jewish people from slavery in Egypt.
By opening the door, the participants not only re-enact the events of the past, but also invite Elijah the Prophet, a prominent figure in Jewish tradition, to join the seder and announce the arrival of the Messianic era.