Jesus did see when Judas started going bad though there's no indication that was when chosen.
Without the article “a devil” and yes, a given considering the context and the rest of the Gospels. Judas was not “THE Devil”
“But it really makes no difference if Judas was a demon (devil) possessed man all along, or if he became Satan-possessed at the Last Supper, the important thing is that either way he would not be able to exercise his free will.”
Repeating a conclusion that you cannot show to be so doesn't make it true.
In none of those Scriptures quoted does it say God “grants” repentance. Repent is something people do, God may or may not forgive as He sees fit but still no “grant”.
For example what in either 2 Cor. 7:9,10 or Rom. 2:4 says repentance is a “grant” from God?
The Bible says that Judas was possessed. If he was possessed by a devil or the devil he wa snot free to exercise his will. Isn't that what being possessed means?
In none of those Scriptures quoted does it say God grants repentance
Okay it says so in Acts 5:31, 11:18, and 2 Tim 2:22. Still having doubts?