The Edomites/Idumeans BLOGGED
The Edomites were descended from Esau, Jacob-Israel’s brother. Esau married Canaanite women and thus broke the first law, which is that each should produce only after their own kind, of only one kind of flesh, not mixing seed with another kind. These wives of his were ‘a grief of mind to Isaac and Rebecca’, his parents. Because he was unrighteous and polluted his bloodline, Rebecca knew that he should not be given the traditional blessing of the first born, and she instructed Jacob on how he could obtain it instead. This added to the jealousy that Esau had for Jacob and continues right through to the present day in the hatred that Jews have for the Europeans.
The tribe of Edom are called the people of God’s curse in the Old Testament, they repeatedly helped Israel’s enemies and joined in the plunder of the Israelites. The first of many wars they made against Israel was following Jacob-Israel’s father Isaac’s death, right after promising him that they would not make war on Jacob’s tribe, referenced in the book of Jubilees.
130 years before Christ was born, there was a final battle with the Edomites whose homeland (Edom/Idumea) was right next to Judea. The Judahites won, but their chiefs had become so estranged from God’s law by then that they thought they could force the Edomites to convert to the Judahite religion at sword point, circumcisions and all.
This is explicitly against God’s covenant with the children of Israel as they are not to take strange wives or to accept strangers into their tribe or religion, especially from the children of Esau. The promises and covenants were made to Jacob Israel and his seed alone, if they married out of their nation then the seed was no longer just of Jacob and the promises no longer applied.
As well as polluting the bloodline and destroying the biological heritage of the Judahites, forcing the Edomites into the Israelite religion meant that they brought strange customs and idolatry into it too, which eventually became the basis for the Talmud.