From The Temple Mystery Unveiled:

The whole bloodline and nation of Edom came to be associated by the Israelites with the Devil, because if they were Israel’s enemies, that meant they were God’s enemies. Recall that, according to cabalistic texts, they were literally descendants of Lilith via Mahalath, one of her human incarnations, who married Esau, the progenitor of the Edomite line. They were associated with “Mount Seir” and the “Wilderness of Seir,” which, as we have mentioned previously, is also connected to Lilith and Azazel. The word seir itself means “hairy,” “he-goat” or “satyr.” As to their pre-Judean religion, nobody is certain of much except that they worshipped a god named Qaus.

My theory: female Horites aka Homo Nesher Ramla are baboon neanderthal hybrids, who survived the flood. Maybe goat DNA was added into the mix as well, but I think the baboon is a dog monkey mix. That's why Jesus called them dogs and both Thoth and Moloch have dog-like features.