Abraham worshipped only ONE God...Jehovah...He did not then know of or about Jesus...Who was in existence in heaven, as Michael, the arch angel, with Jehovah as his father...
Only later was he to become the Messiah, the Saviour...
(John 1:1) In the beginning was the Word, and the Word was with God, and the Word was a god.
THE WORD [ JESUS ] WAS " WITH " GOD.
Jehovah and Jesus [ Father and Son ] are separate identities.
(Proverbs 8:22-31) Jehovah produced me as the beginning of his way, The earliest of his achievements of long ago. 23 From ancient times I was installed, From the start, from times earlier than the earth. 24 When there were no deep waters, I was brought forth, When there were no springs overflowing with water. 25 Before the mountains were set in place, Before the hills, I was brought forth, 26 When he had not yet made the earth and its fields Or the first clods of earth’s soil. 27 When he prepared the heavens, I was there; When he marked out the horizon on the surface of the waters, 28 When he established the clouds above, When he founded the fountains of the deep, 29 When he set a decree for the sea That its waters should not pass beyond his order, When he established the foundations of the earth, 30 Then I was beside him as a master worker. I was the one he was especially fond of day by day; I rejoiced before him all the time; 31 I rejoiced over his habitable earth, And I was especially fond of the sons of men.
From this scripture it is clear that Jesus cannot possibly be the same person/personality as Jehovah...Jesus was created.