So your saying you believe the prodigal was a son, stopped being a son (lost salvation) then was restored?
No, I do not believe in multiple regenerations.
Just asking for confirmation, again, if the son died in a prodigal state, would he have been his fathers son, or cast out to eternal darkness?
Now answer my question...
Was the second son in Matthew 21:28-32 saved?
I'll answer it for you. Seeing the second son in Matthew 21:28-32 represented the unbelieving chief priests and elders, the answer is NO.
So where did you get this strange notion that Jesus' use of the word "son" in parables indicates a saved, born again person
You are reading your doctrine and your preexisting beliefs into the text, making the scriptures conform to your beliefs instead of allowing the scriptures to mold what you believe.