Kabbalah su Genesi 6:13

From the words "is come before Me" we learn that wicked people hasten to attract the Angel of Death upon themselves in order to bring darkness upon themselves. Therefore, because they give him permission, he grabs the soul. But he never takes the soul without permission. That is why (the Pasuk says), "Is come before Me." i.e. to get permission to bring darkness upon the faces of people of the world. And that is why it is written: "I will destroy them with the earth" (Gen. 6:13). Because (Hashem gave permission): "make an ark of Gopher wood" (Ibid. 14), on which to save yourself so that he should have no power over you.

A person who is righteous is (himself) a sacrifice given for atonement (because he sacrifices his own desire, overcoming his will). But a person, who is not righteous, is not accepted as a sacrifice because he is blemished. As it is written: "For it shall not be acceptable for you" (Lev. 22:20). So the righteous alone atone for the world and are accepted as sacrifices in this world. (Until here) (parenthesis in the text). Come and behold: "And Elohim said to Noah, the End of all Flesh is come before Me" (Gen. 6:13), And it came to receive permission to darken the faces of humankind. So that is why "I will destroy them with the earth" (Ibid.)

These are the ones who remained of those of whom it was said at the time of the flood, "And He destroyed every living substance" (Beresheet 7:23). Those who survived, (the Kelipah of Amalek) from the time of the fourth exile - (Edom) - became the leaders (lit. heads) of the world, men of great power. They became a means of violence toward Yisrael and of them, it is written at the time of the flood, "For the earth is filled with violence through them" (Beresheet 6:13). These are the Amalekites.