Why did God choose the posterity of Isaac to be a blessed Nation? Why did God choose Jacob in preference to Esau? Why did Esau serve Jacob?

There is a great controversial matter presented in Romans Chapter 9

Yes! God is sovereign, Almighty so he can choose any body to be any body, but He is not unrighteous in choosing any body to be his vessel and rejecting some one.

Romans 3:23 reads, “for all have sinned and fall short of the glory of God”

Romans 5:17 “For if, by the trespass of the one man, death reigned through that one man, how much more will those who receive God's abundant provision of grace and of the gift of righteousness reign in life through the one man, Jesus Christ”

Psalm 44:21 “would not God have discovered it, since he knows the secrets of the heart?”

Jeremiah 17:10 "I the LORD search the heart and examine the mind, to reward a man according to his conduct, according to what his deeds deserve."

Genesis 25: 33 “But Jacob said, "Swear to me first." So he swore an oath to him, selling his birthright to Jacob.

34 Then Jacob gave Esau some bread and some lentil stew. He ate and drank, and then got up and left. So Esau despised his birthright.

Let us ponder over few verses from

Matthew 26:

20 When evening came, Jesus was reclining at the table with the Twelve. 21And while they were eating, he said, "I tell you the truth, one of you will betray me."
22 They were very sad and began to say to him one after the other, "Surely not I, Lord?"
23 Jesus replied, "The one who has dipped his hand into the bowl with me will betray me.
24The Son of Man will go just as it is written about him. But woe to that man who betrays the Son of Man! It would be better for him if he had not been born."

”The angel of the LORD found Hagar near a spring in the desert; it was the spring that is beside the road to Shur.” Genesis 16:7

Genesis 16:
11 The angel of the LORD also said to her:
"You are now with child and you will have a son. You shall name him Ishmael, for the LORD has heard of your misery. 12 He will be a wild donkey of a man; his hand will be against everyone and everyone's hand against him, and he will live in hostility toward all his brothers."

Genesis 17:18 And Abraham said to God, "If only Ishmael might live under your blessing!" 19 Then God said, "Yes, but your wife Sarah will bear you a son, and you will call him Isaac. I will establish my covenant with him as an everlasting covenant for his descendants after him. 20 And as for Ishmael, I have heard you: I will surely bless him; I will make him fruitful and will greatly increase his numbers. He will be the father of twelve rulers, and I will make him into a great nation. 21 But my covenant I will establish with Isaac, whom Sarah will bear to you by this time next year." 22 When he had finished speaking with Abraham, God went up from him.

I could only say that Judas Iscariot's case is enigmatic; God alone knows where he is. I am neither a follower of Calvinism, nor Arminianism; rather I am a follower of Jesus Christ my Savior. I obey my God in the name of His Son Jesus Christ. There are great many mysteries in the Bible, and I am yet to learn a great deal.

"Does not the potter have the right to make out of the same lump of clay some pottery for noble purposes and some for common use?" Romans 9:21