And seeing that his father Isaac disapproved of the Canaanite women,
This passage concerning Esau comes in in the midst of Jacob's story, either, 1. To show the influence of a good example. Esau, though the greater man, now begins to think Jacob the better man, and disdains not to take him for his pattern in this particular instance of marrying with a daughter of Abraham.
Commenting on Genesis 28:6-9
And Esau seeing that the daughters of Canaan pleased not Isaac his father. Who he perceived was displeased with the daughters of Canaan, or that they were "evil in his eyes" (i), offensive to him, and disapproved of by him, because of their ill manners: Rebekah is not mentioned, whose displeasure he cared not for. (i) "malae in oculis", Montanus, Junius & Tremellius, Piscator, Drusius, Schmidt.
Gen 28:6-9 When Esau heard of this blessing and the sending away of Jacob, and saw therein the displeasure of his parents at his Hittite wives, he went to Ishmael - i.e., to the family of Ishmael, for Ishmael himself had been dead fourteen years - and took as a third wife Mahalath, a daughter of Ishmael (called Bashemath in Gen 36:3, a descendant of...
Commenting on Genesis 28:6-9