Some people believe Judas should not be blamed for betraying Jesus Christ in that but for the death of Christ salvation would not have come to mankind. But the truth is that no amount of defense can absolve him from guilt or condemnation. Judas sinned deliberately. He sinned against the Holy spirit, a sin for which there is no forgiveness. – Matthew 12:31,32; 2 Peter 2:2-22.
Even before Judas carried out his evil plan Jesus Christ had stated clearly that one among his disciples was “a devil” (John 6: 70, 71) and that one of the apostles would betray him; (Matthew 26: 20, 21) and that woe betide the man by whom he would be betrayed, saying “it had been good for that man if he had not been born.” Even Judas, “Master, is it I?” Christ said unto him, “Thou hast said”. (Matthew 26: 22-25) If Judas Iscariot was not a man really given to wickedness, the woe pronounced by Jesus Christ upon whoever the traitor would be would have been enough warning for him to desist from carrying out his treachery. But being an instrument of the devil he was bent on accomplishing his plot. In fact it while Jesus Christ and the other apostles were heavy in sorrow that Judas Iscariot with his co-plotters arrived to arrest Lord and Master.—Matthew 26: 47-50,
The point, which must not be overlooked, is that Judas and others who took part in the betrayal and crucifixion were not acting out of good will. They did not kill him because they believed that through the death of Jesus Christ blessing would come to mankind. Their intention was to kill him and put an end to Christianity.
The fact that it was foretold earlier that Jesus Christ would be betrayed and killed was not a licence or mandate given anyone by God to do so. The Almighty God, knowing the end from the beginning, only revealed through His prophets what His Son would suffer in the world during his mission of redemption. It was also shown in the prophecies that those who world betray and kill him would be evil doers. Therefore whoever was not wicked could not have been an object upon whom such prophecies could fulfill.
In the long run Judas himself realized that he had sinned and he acknowledged his guilt. As it saying “I have sinned in that I have betrayed the innocent blood…” (Matthew 27: 3-6) Since Judas had pleaded guilty and confessed that he had sinned by betraying the innocent blood, it is ridiculous for anybody to stand as his advocate to justify his nefarious deed. The priests themselves said that it was not lawful to put the pieces of silver returned by Judas into the treasury “because it is the price of blood” If Judas Iscariot had done well by betraying our Lord, he would not have committed suicide thus adding sin to sin. –Acts 1: 16-20; Matthew 12: 31, 32; Acts 1: 24, 25.