Rom. 9:13
As it is written, Jacob have I loved, but Esau have I hated.
JACOB and his posterity [Jacobs] are God's Vessels of Mercy Rom. 9:23, which consists of the World of God's Elect [kosmos] that God Loved and gave His only begotten Son for to have Everlasting Life John 3:16; His Election of Grace Eph. 1:4-7; Rom. 11:5, hence they are Christ's Seed and one with Him. So everyone of them shall be Born of the Spirit / born again and given Faith to Believe in Him Gal. 5:22; Titus 1:1: The ISRAEL which was Promised Salvation Is. 45:17; the Spiritual Seed of Abraham, the Seed of Christ Gal. 3:16, 29 whether jew or gentile.
On the other hand, ESAU and his posterity [Esaus] are God's Vessels of Wrath Rom. 9:22, that were always outside of His Grace, and which He has purposely fitted for destruction. Jesus referred to them as serpents and the generation of vipers Mat. 23:32-33 condemned to hell, the seed of the devil and one with him, Created by God to suffer eternal shame and contempt Dan. 12:2; Rev. 21:8, whether jew or gentile.