So if God hardens some, that's giving the hardened an equal chance to be saved?
Yes, it is because all people are given the choice to acknowledge God. It works similar to the following:
Job 36:9-12 Then He tells them their work and their transgressions—That they have acted defiantly. He also opens their ear to instruction, And commands that they turn from iniquity. If they obey and serve Him, They shall spend their days in prosperity, And their years in pleasures. But if they do not obey, They shall perish by the sword, And they shall die without knowledge.
Note the scripture shows how this type of person is saved. But it can apply generally to general salvation.
a) He also opens their ear to instruction
b) And commands that they turn from iniquity
Then comes the choice:
c) If they obey and serve Him, They shall spend their days in prosperity, And their years in pleasures
d) But if they do not obey, They shall perish by the sword, And they shall die without knowledge.
The same man is given two outcomes based on his own choice.
If you look at Romans, you will see this principle in action:
Rom 1:18-22 For the wrath of God is revealed from heaven against all ungodliness and unrighteousness of men, who suppress the truth in unrighteousness, because what may be known of God is manifest in them, for God has shown it to them. For since the creation of the world His invisible attributes are clearly seen, being understood by the things that are made, even His eternal power and Godhead, so that they are without excuse, because, although they knew God, they did not glorify Him as God, nor were thankful, but became futile in their thoughts, and their foolish hearts were darkened. Professing to be wise, they became fools,
a) God gets angry when
b) He has clearly shown who He is
c) If people know who God is suppress the truth
d) They are given to a darkened heart
The person in Job is given the same goodwill as any man, but their own choice of either listening to God or not determines if they are saved.
As Jesus said a person not "seeing" has no sin.
John 9:41 Jesus said to them, "If you were blind, you would have no sin; but now you say, 'We see.' Therefore your sin remains.
John 15:22 If I had not come and spoken to them, they would have no sin, but now they have no excuse for their sin.
John 15:24 If I had not done among them the works which no one else did, they would have no sin; but now they have seen and also hated both Me and My Father.
All will be given sight, it depends on what we do with it. Whether we forsake our sins and follow Christ or live in them. Turning to sin results in blindness, turning to God in sight.