Matthew23:33 Ye serpents
[ophis], ye generation of vipers, how can ye escape the damnation of hell?
Just how polluted was Esau's line? Let us examine the genealogy of Edom.
34 And Esau was forty years old when he took to wife Judith the daughter of Beeri the Hittite, and Bashemath the daughter of Elon the Hittite:
35 Which were a grief of mind unto Isaac and to Rebekah.
Hittites were related to the Canaanites. See Genesis 15:18-21; Exodus 3:17, 13:15, 23:23; Number 13:29 for example. Go to http://www.blueletterbible.org/index.cfm
and search Hittites to find more verses.
8 And Esau seeing that the daughters of Canaan pleased not Isaac his father;
9 Then went Esau unto Ishmael, and took unto the wives which he had Mahalath the daughter of Ishmael Abraham's son, the sister of Nebajoth, to be his wife.
1 Now these are the generations of Esau, who is Edom.
2 Esau took his wives of the daughters of Canaan; Adah the daughter of Elon the Hittite, and Aholibamah the daughter of Anah the daughter of Zibeon the Hivite;
8 And Bashemath Ishmael's daughter, sister of Nebajoth.
Thus dwelt Esau in mount Seir: Esau is Edom.
9 And these are the generations of Esau the father of the Edomites in mount Seir:
12 And Timna
was concubine to Eliphaz Esau's son; and she bare to Eliphaz Amalek
20 These are the sons of Seir the Horite
, who inhabited the land; Lotan, and Shobal, and Zibeon, and Anah,
21 And Dishon, and Ezer, and Dishan: these are the dukes of the Horites, the children of Seir in the land of Edom.
22 And the children of Lotan were Hori and Hemam; and Lotan's sister was Timna
So, the Edomites dwelt in the land of Seir and intermarried with the Horites or Horim. Why is that important?
1 And it came to pass in the days of Amraphel king of Shinar, Arioch king of Ellasar, Chedorlaomer king of Elam, and Tidal king of nations;
2 That these made war with Bera king of Sodom, and with Birsha king of Gomorrah, Shinab king of Admah, and Shemeber king of Zeboiim, and the king of Bela, which is Zoar.
3 All these were joined together in the vale of Siddim, which is the salt sea.
4 Twelve years they served Chedorlaomer, and in the thirteenth year they rebelled.
5 And in the fourteenth year came Chedorlaomer, and the kings that were with him, and smote the Rephaims in Ashteroth Karnaim, and the Zuzims in Ham, and the Emims in Shaveh Kiriathaim,
6 And the Horites
in their mount Seir, unto El-paran, which is by the wilderness.
Deuteronomy 2:10-12, 20-23
10 The Emims dwelt therein in times past, a people great, and many, and tall, as the Anakims;
11 Which also were accounted giants
[Rephaim], as the Anakims; but the Moabites call them Emims.
12 The Horims
also dwelt in Seir beforetime; but the children of Esau succeeded them, when they had destroyed them from before them, and dwelt in their stead; as Israel did unto the land of his possession, which the LORD gave unto them.
20 (That also was accounted a land of giants
[Rephaim] dwelt therein in old time; and the Ammonites call them Zamzummims;
21 A people great, and many, and tall, as the Anakims; but the LORD destroyed them before them; and they succeeded them, and dwelt in their stead:
22 As he did to the children of Esau, which dwelt in Seir, when he destroyed the Horims
from before them; and they succeeded them, and dwelt in their stead even unto this day:
23 And the Avims which dwelt in Hazerim, even unto Azzah, the Caphtorims, which came forth out of Caphtor, destroyed them, and dwelt in their stead.)
But as we saw from the record of Genesis ch. 36, The Edomites did not utterly destroy the Horites/Horim, but took wives of them, and had children by them.
The Rephaim and other tribes such as the Horim were descended from the Nephilim. They bore the seed of the serpent, being the product of the intermarriage between fallen angels and human women.
If any want to challenge the fact that the "sons of God" of Genesis chapter 6 were angels, just look at the following verses.
1 And it came to pass, when men began to multiply on the face of the earth, and daughters were born unto them,
2 That the sons of God
saw the daughters of men that they were fair; and they took them wives of all which they chose.
Job 1:6 Now there was a day when the sons of God
came to present themselves before the LORD, and Satan came also among them.
Job 2:1 Again there was a day when the sons of God
came to present themselves before the LORD, and Satan came also among them to present himself before the LORD.
Job 38:7 When the morning stars sang together, and all the sons of God
shouted for joy?
Psalm 29:1 Give unto the LORD, O ye mighty
[actually bene el in Hebrew, "sons of God"], give unto the LORD glory and strength.
Psalm 89:6 For who in the heaven
can be compared unto the LORD? who among the sons of the mighty
[el in Hebrew, "God"] can be likened unto the LORD?