Classic Calvinist argument, ask a difficult question that people cannot answer.
Look, I like mustard on a hamburger, most folks prefer ketchup. Why? I don't know.
I could ask you the same, why does God only save a few people when he could save all?
Now, you can't answer that one, but I can.
I can answer both and quite easily with Bible-
God decreed it.
Lam 3:37-38 Who has spoken and it came to pass, unless the Lord has commanded it? Is it not from the mouth of the Most High that
good and bad come?
Amos 3:6 Is a trumpet blown in a city, and the people are not afraid? Does disaster come to a city, unless the Lord has done it?
Deut 32:39 See now that I, even I, am He, and there is no god beside me; I kill and I make alive; I wound and I heal; and there is none that can deliver out of my hand.
Isa 46:10 Declaring the end from the beginning and from ancient times things not yet done, saying, ‘My counsel shall stand, and I will accomplish all My purpose,’
Prov 21:1 The king’s heart is a stream of water in the hand of the Lord; He turns it wherever He will.
Isa 6:10 Make the heart of this people dull, and their ears heavy, and blind their eyes; lest they see with their eyes, and hear with their ears, and understand with their hearts, and turn and be healed. (Note – this is the 3rd most frequently quoted passage in the NT)
Ezek 36:26-27 And I will give you a new heart, and a new spirit I will put within you. And I will remove the heart of stone from your flesh and give you a heart of flesh. And I will put my Spirit within you, and cause you to walk in My statutes and be careful to obey My rules.
Mark 4:11-12 And He said to them, “To you has been given the secret of the kingdom of God, but for those outside everything is in parables, so that “they may indeed see but not perceive, and may indeed hear but not understand, lest they should turn and be forgiven.”
John 6:44 No one can come to me unless the Father who sent me draws him. And I will raise him up on the last day.
John 6:65 And He said, “This is why I told you that no one can come to Me unless it is granted him by the Father.”
John 8:43 Why do you not understand what I say? It is because you cannot bear to hear my word.
John 10:26 but you do not believe because you are not part of my flock.
John 12:39-40 Therefore they could not believe. For again Isaiah said, “He has blinded their eyes and hardened their heart, lest they see with their eyes, and understand with their heart, and turn, and I would heal them.”
Rom 6:17 But thanks be to God, that you who were once slaves of sin have become obedient from the heart to the standard of teaching to which you were committed,
Rom 8:7-8 For the mind that is set on the flesh is hostile to God, for it does not submit to God’s law; indeed, it cannot. Those who are in the flesh cannot please God.
Rom 9:18 So then He has mercy on whomever He wills, and He hardens whomever He wills.
Rom 11:8 As it is written, “God gave them a spirit of stupor, eyes that would not see and ears that would not hear, down to this very day.”
Rev 17:17 For God has put it into their hearts to carry out His purpose by being of one mind and handing over their royal power to the beast, until the words of God are fulfilled.