Even though Rebekah had Jacob trick his father into believing he was Esau, because she loved Jacob more, the blessing would have still gone to Jacob over that of Esau for the promise God made with Abraham in Genesis 12:1-3. God hated not Esau, but that Esau was weak and gave up his birthright (as Jethro already said for a natural worldly appetite) as he was later called Edom in who God already knew that Esau's nation would be that of the Edomites who would always fight against Israel (Jacob) even though God gave blessings to Esau in that he always had enough, Gen 27:39; 33:9
Gen 25:23 And the LORD said unto her, Two nations are in thy womb, and two manner of people shall be separated from thy bowels; and the one people shall be stronger than the other people; and the elder shall serve the younger.
Gen 25:30 And Esau said to Jacob, Feed me, I pray thee, with that same red pottage; for I am faint: therefore was his name called Edom.
Gen 27:38 And Esau said unto his father, Hast thou but one blessing, my father? bless me, even me also, O my father. And Esau lifted up his voice, and wept.
Gen 27:39 And Isaac his father answered and said unto him, Behold, thy dwelling shall be the fatness of the earth, and of the dew of heaven from above;
Gen 27:40 And by thy sword shalt thou live, and shalt serve thy brother; and it shall come to pass when thou shalt have the dominion, that thou shalt break his yoke from off thy neck.
Gen 27:41 And Esau hated Jacob because of the blessing wherewith his father blessed him: and Esau said in his heart, The days of mourning for my father are at hand; then will I slay my brother Jacob.