By nature, a person has an unrepentant heart Rom. 2:5.
No, that is not about all humans; not all humans have an unrepentant heart.
God does not cause some to have an unrepentant heart over others.
first he must become Saved when God gives him a New Heart Ezek.36:26,
God does not save first then wait for obedience.
Jesus is the Way.
Jesus tells us how to be saved.
After we believe and obey Jesus, then we are saved.
and quickens him from death to Spiritual Life. Only then can they repent, just like the prodigal son, he was dead but became alive Luke 15:24.
That's what being Saved by Grace is all about.
Eph. 2:5
Even when we were dead in sins, hath quickened us together with Christ, (by grace ye are saved)
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Being dead in sins is about the Gentiles. The Gentiles were dead in their sins because they did not want to submit to the law of circumcision. The law of circumcision is symbolic of the ceremonial/purification works the Jews USED TO HAVE TO DO just to make THEMSELVES clean so that they could go to the temple to worship God.
That scripture you quote is about how Jesus saves obedient Gentiles even though they were not circumcised:
Colossians 2:13 When you were
dead in your sins and in the
uncircumcision of your flesh, God made you alive with Christ. He forgave us all our sins,
Jesus saved the enemy Gentiles and did NOT make them get circumcised before they could be saved.