The command of the Lord (which we also need to echo because of the Great Commission) is to repent and believe. Of course people in their natural state of being dead in their sins can't respond in faith. But that does not absolve them of their responsibility. People are accountable to God for their rebellion to Him.
That is absurd if your belief is true. They
cannot repent because God will not allow them to repent. That would make God 100% responsible if they go to Hell.
If your belief is true, God is like a little spoiled child who sets out all his toys and then takes a hammer and crushes some simply for fun.
If your belief is true, God could cause all to believe. But for reasons outside an individuals control, God forces some to believe, and forces the rest to not believe.
As I wrote before, this would make the preaching of the gospel completely meaningless. Those whom God gives grace and causes to believe will simply believe no matter what, and those whom God chooses to damn will not believe no matter what. The gospel would be irrelevant.
It certainly is justice -- it's just not mercy. Don't confuse the two. The Lord does not have mercy upon each and every person. He hardens those He wishes to harden and literally mercies those He wishes to mercy.
What you fail to understand is that God has one way of salvation and one only. A person must trust on Jesus Christ for salvation. God will show those who trust on Christ mercy, those who refuse to come to Christ he will show wrath.
1 Tim 1:15 This is a faithful saying, and worthy of all acceptation, that Christ Jesus came into the world to save sinners; of whom I am chief.
16 Howbeit for this cause I obtained mercy, that in me first Jesus Christ might shew forth all longsuffering, for a pattern to them which should hereafter believe on him to life everlasting.
What Paul is saying here is that the Lord is showing how longsuffering he is to save any sinner. The Bible shows that God is not willing that any man should perish.
2 Pet 3:9 The Lord is not slack concerning his promise, as some men count slackness;
but is longsuffering to us-ward, not willing that any should perish, but that all should come to repentance.
This verse goes right along with 1 Tim 1:16 showing that God is longsuffering. He gives a person many chances to repent and believe on Jesus.
Now that would make no sense whatsoever if God has already determined if a man believes or not.
Now when you go to Romans 9, it is speaking of Pharoah. God gave Pharoah many chances to repent. God was very long-suffering toward Pharoah. I cannot imagine any other man who would not respond to God after seeing all the miraculous plagues God brought on Egypt. But Pharoah would not repent, therefore God was just in pouring out his wrath on him.
Rom 9:21 Hath not the potter power over the clay, of the same lump to make one vessel unto honour, and another unto dishonour?
22 What if God, willing to shew his wrath, and to make his power known,
endured with much longsuffering the vessels of wrath fitted to destruction:
23 And that he might make known the riches of his glory on the vessels of mercy, which he had afore prepared unto glory,
God does know before who will believe and who will not. He gives every person a free will to choose to believe or not believe. And he has already determined he will be merciful to those who believe, and show wrath to those who do not.
Now, is it right for God to make a man which God knows will not believe?
Yes. If God did not give them a chance to live, that would not be right. They would have no choice to believe or not believe. And for there to be love, there must be choice. So God must even create those who refuse to believe. God does not force them to believe or disbelieve, he does not create them incapable of believeing. But God does know beforehand who will choose to believe, and who will not. But of love, he must give them life, and a free-will, that allows them to choose to believe for themselves or not.
Do you have any kids? I do. And when they are very little we take care of them because they are unable to care for themselves. But when they reach a certain age, we must allow them to live as they choose. If I was telling my grown children exactly how they must live, I promise you they would not consider that very loving. And you know what? Before I had children, I knew there would come times they would not listen to me. There was even the chance that they would be absolutely rebellious and never listen to me. But that is the chance you take when you have children. You do the best you can to lead them in the way they should go. That is love. But love also gives them individual free will. They are not my prisoners, they are not my captive slaves, they are not pre-programmed robots.
And it is the same with God. He must give us free-will, otherwise there is no love. Without choice, you are nothing but a slave and a robot.
Does that make any sense to you?