Yes Thaddeus, they were both sons, but the prodigal son didn't die in his unrepentant state, so you can't really use that example. Look at the case of Lazarus and the Rich man, Abraham calls him "son" and the rich man calls Abraham "Father", even while the rich man is being tormented in the flames. Now that's an example of someone dying , the rich man, who obviously was thought to be God's son and thought God to be his father, yet still went to hell. Look in the KJV if you like, and tell me you can't see the words "son" and "father" there?
Plus we have early church writings that use the example of a son being disinherited by the father as what happens if God rejects his own.
Thaddeus do you or do you not believe that if a christian man, say a priest, rapes children , who once was a lovely man and called to the ministry and blessed by God, and does not change his ways, he is still going to heaven? So we have a formerly disobedient lovely man of God, who has an unresolved issue, maybe he gets divorced or maybe unresolved anger towards his parents or shame from his own abusive childhood, and he starts to abuse children , thereby becoming a disobedient child of God.
Let's hear some straight answers from you for a change.