It seems you at least acknowledge in the NT where God does withholds His grace and a person is lost forever. That's a start.
That IS the theme of this tread when I stated that sodomy is an abomination before God and is an indication that a person might have cross that line based upon Romans 1. That is not to say that a person still cannot be saved from that situation. It only is to say it is an indication of deep depravity in their lives.
People simply don't wish to acknowledge the depravity of man and how rebellious we are. Instead they simply want to focus on God's grace and goodness. There are two sides to this coin.
Which NO MAN could EVER fix. BUT GOD did in Christ through the cross. Grace, UNMERITED FAVOR, is ours because Jesus took the hit for ALL the sins of ALL the WORLD.
In the OT Elijah's sacrifice along with all the priests of Baal was consumed by God's judgment. But on the cross, the sacrifice of Christ consumed all of God's wrath, condemnation, and judgement. He declared, "IT IS FINISHED" and sealed the deal upon his resurrection.
Jesus said to the sexually promiscuous woman, "I do not condemn you"and "There is therefore NO CONDEMNATION to those in Christ" (Rom 8:1 - (the original does NOT contain the qualifications some translations have in the rest of that verse)).
Christ paid for everyone's sins forever. You commit double jeopardy by trying to condemn sodomites for whose sins Christ paid the full price. You think sodomites' sins are greater than yours? Not in God's eyes.
You need to study the books of Romans and Galatians which unfold the details of the gospel of the grace of Christ by which we are saved without works, and reread them several times.