Peter understood, Judas didn't !

Judas turned on Jesus, not knowing His plan here on earth, trying to make Him proof He was the Messiah, or Judas not knowing God's plan, no longer thought Jesus was the Son of God; Satan's role doesn't remove any responsibility from Judas; Satan thought Jesus death would thwart ( defeat ) God's plan ( 1 Cor 2:8 ); but Jesus knew about Peter, and Judas, so Judas had the chance to repent just like Peter did for denying Jesus three times ( Jn 13:27-38 ) God bless!