Psalms 64:8 | So they shall make their own tongue to fall upon themselves: all that see them shall flee away.
It does not matter how long ago it happened or much of it gets covered up, Edomites will be judged for every ounce of wickedness they inflicted on the Israelites, as well as the other heathen nations; ignorance will not excuse any of the nation of Edom.
Romans 9:13 | As it is written, Jacob have I loved, but Esau have I hated. 14What shall we say then? Is there unrighteousness with God? God forbid. 15For he saith to Moses, I will have mercy on whom I will have mercy, and I will have compassion on whom I will have compassion. 16So then it is not of him that willeth, nor of him that runneth, but of God that sheweth mercy. 17For the scripture saith unto Pharaoh, Even for this same purpose have I raised thee up, that I might shew my power in thee, and that my name might be declared throughout all the earth. 18Therefore hath he mercy on whom he will have mercy, and whom he will he hardeneth.
Revelation 18:3 | For all nations have drunk of the wine of the wrath of her fornication, and the kings of the earth have committed fornication with her, and the merchants of the earth are waxed rich through the abundance of her delicacies. 4And I heard another voice from heaven, saying, Come out of her, my people, that ye be not partakers of her sins, and that ye receive not of her plagues. 5For her sins have reached unto heaven, and God hath remembered her iniquities. 6Reward her even as she rewarded you, and double unto her double according to her works: in the cup which she hath filled fill to her double. 7How much she hath glorified herself, and lived deliciously, so much torment and sorrow give her: for she saith in her heart, I sit a queen, and am no widow, and shall see no sorrow. 8Therefore shall her plagues come in one day, death, and mourning, and famine; and she shall be utterly burned with fire: for strong is the Lord God who judgeth her. 9And the kings of the earth, who have committed fornication and lived deliciously with her, shall bewail her, and lament for her, when they shall see the smoke of her burning,