The intercessory gap between Judas and Peter
Peter’s crime was not fundamentally "bigger" than Judas’s. One denied Jesus, while the other sold Him out; both were acts of betrayal, and in those moments, neither man was a saint. Both had prophetic weights hanging over them.
In the case of Judas, the scriptures spoke of his desolation. As recorded in Acts 1:20, the disciples pointed back to the Psalms to justify his replacement, quoting:
"May his place be deserted; let there be no one to dwell in it" (Psalm 69:25) and "May another take his place of leadership" (Psalm 109:8).
I have often wondered if there was something flawed in Judas’s bloodline, or if he was simply a victim of a prophecy and a relentless satanic attack. It is recorded that Satan entered him, but we must remember that Peter was also under a heavy prophetic warning. Jesus told him plainly: "Satan has desired to sift you like wheat, but I have prayed for you." We even see Satan’s influence in Peter’s attempt to divert Jesus from the cross.
Furthermore, while we judge Judas for his greed, Peter was equally driven by a worldly, political ambition. He couldn't fathom Jesus dying because he was already mentally occupied with the political appointment he expected to receive in an earthly kingdom.
The true difference between Judas and Peter was not the nature of their sin, but the grace of intercession. The reason one was "replaced" while the other was "restored" comes down to the place of prayer. Jesus stood in the gap for Peter before the fall ever happened.
If we look at their cases practically, Satan hunted both men and successfully broke both of them. However, Peter was able to repent because he had an intercessor. This suggests that if Judas had been covered by that same intercessory grace, even after his fall, he too might have found the path back to restoration instead of being replaced by another.

