Judas Iscariot certainly had an active role in the Passion of Christ, but was he necessary? Without him, would Christ have died for our sins? Did God will that he betray Jesus?
Lino Lista, a prolific critic of the Neocatechumenal Way, responds:
“The decision to kill Jesus had already been taken (John 7:1) and He had already escaped from the hands of his adversaries, escaping from the precipice and stoning (Luke 4: 29-30; John 8:59; John 10: 31-39 ). Had he wanted to, Christ could have escaped capture capture even in the Garden of Gethsemane (Matthew 26:53: ” Do you think I can not call on my Father, that would give me more than twelve legions of angels ? “). It was only up to Christ, therefore, to decide the time (John 7:30), the place and manner of his Passion. Only Christ is essential: Judas is not necessary and not even enough.”
It is unfortunate that Mr. White chose to listen to Lino Lista rather than to the Catechism of the Catholic Church. Judas Iscariot was necessary because he was PART of God's plan of salvation. It is true that God did not predestine Judas to become a sinner. It was Judas' choice to sin, which God already knew. Predestination has a different meaning to Catholics compared to Protestants. According to the Catholic teaching on predestination: Predestination is a term used to identify God’s plan of salvation, in which according to His own decree, He “accomplishes all things according to his will” (Eph. 1:11). God gives us the gift of salvation through grace and faith. In turn, we must use our free will to persevere in good works “prepared beforehand” by God Himself (Eph. 2:8-10; cf. Phil. 2:12, 13).
The Catechism of the Catholic Church also states (the bold is mine): To God, all moments of time are present in their immediacy. When therefore he establishes his eternal plan of "predestination", he includes in it each person's free response to his grace: "In this city, in fact, both Herod and Pontius Pilate, with the Gentiles and the peoples of Israel, gathered together against your holy servant Jesus, whom you anointed, to do whatever your hand and your plan had predestined to take place." For the sake of accomplishing his plan of salvation, God permitted the acts that flowed from their blindness. (CCC 600).
In other words, Judas Iscariot was PART of God's plan of salvation. God used Judas Iscariot's choice and free will to sin to bring about His plan of salvation to mankind in accordance with Scripture. According to the Catechism of the Catholic Church (bold is mine):
CCC 599 Jesus' violent death was not the result of chance in an unfortunate coincidence of circumstances, but is part of the mystery of God's plan, as St. Peter explains to the Jews of Jerusalem in his first sermon on Pentecost: "This Jesus [was] delivered up according to the definite plan and foreknowledge of God."393 This Biblical language does not mean that those who handed him over were merely passive players in a scenario written in advance by God.394
CCC 600 To God, all moments of time are present in their immediacy. When therefore he establishes his eternal plan of "predestination", he includes in it each person's free response to his grace: "In this city, in fact, both Herod and Pontius Pilate, with the Gentiles and the peoples of Israel, gathered together against your holy servant Jesus, whom you anointed, to do whatever your hand and your plan had predestined to take place."395 For the sake of accomplishing his plan of salvation, God permitted the acts that flowed from their blindness.396
"He died for our sins in accordance with the Scriptures"
CCC 601 The Scriptures had foretold this divine plan of salvation through the putting to death of "the righteous one, my Servant" as a mystery of universal redemption, that is, as the ransom that would free men from the slavery of sin.397 Citing a confession of faith that he himself had "received", St. Paul professes that "Christ died for our sins in accordance with the scriptures."398 In particular Jesus' redemptive death fulfills Isaiah's prophecy of the suffering Servant.399 Indeed Jesus himself explained the meaning of his life and death in the light of God's suffering Servant.400 After his Resurrection he gave this interpretation of the Scriptures to the disciples at Emmaus, and then to the apostles.401
To put it simply, the Old Testament prophecies were fulfilled according to God's divine plan of salvation. The prophets of the Old Testament prophesized about a betrayer because God already knew the future and Judas' choice to sin, and the prophecy came to pass in order to fulfill God's plan of salvation in accordance with Scripture. Mr. White interpreted Kiko's painting according to his prejudice view. Kiko painted Christ in white robes and with wounds to show that He was indeed the unblemished Lamb of God who offered His body as a sacrifice at the Last Supper.