Malachi 1:4

Even though the Edomites, Esau’s descendants, determined to rebuild their nation after it had suffered destruction by the Babylonians, they would not be able to do so. They could not because almighty Yahweh would not permit it. He would tear down whatever they rebuilt, so much so that other people would view them as a wicked land (cf. the holy land, Zechariah 2:12) and the objects of Yahweh’s perpetual indignation. The "holy" land was holy, sanctified, because God set it apart for special blessing, as He had the nation of Israel. Edom, on the other hand, was wicked because God had not set it apart for special blessing.

"Israel needed to consider what her lot would have been if she, like Edom, had not been elected to a covenant relationship with Yahweh. Both Israel and Edom received judgment from God at the hands of the Babylonians in the sixth century (Jeremiah 27:2-8). Yet God repeatedly promised to restore Israel (because of His covenant promises, Deuteronomy 4:29-31; Deuteronomy 30:1-10), but He condemned Edom to complete destruction, never to be restored (Jeremiah 49:7-22; Ezekiel 35)." [Note: Blaising, p. 1576.]

"The Judeans had Persian permission and support in their rebuilding campaign (Ezra 1:1-11; Ezra 4:3; Ezra 6:1-15; Ezra 7:11-28; Nehemiah 2:7-9; Nehemiah 13:6). That was God’s doing. The Edomites had no such help, which was also God’s doing and which sealed Edom’s fate as a people forever." [Note: Stuart, p. 1289.]