Sven asked: “Does Jude’s suicide show a lack of believe in eternal damnation?”
I don’t know the answer to that, but I am certain Jesus never taught “eternal” damnation; rather, he warned of aionios, “age-during” [with a beginning and an end] damnation. (Please see my discussion on Matthew 25:46 at the end of, “Is God Violent, Or Nonviolent?”).
I would argue that Judas Iscariot was not born again at the time of his death, since the first disciples were not born again until later than that, when they received the Holy Spirit from the resurrected Christ:
And with that he breathed on them and said, “Receive the Holy Spirit.” John 20:22.
And so Judas died remorseful but unrepentant, still a prisoner to his sins; hence, his soul went to hell-Hades-Gehenna:
“The Son of Man will go just as it is written about him. But woe to that man who betrays the Son of Man! It would be better for him if he had not been born.” Matthew 26:24.
Then Jesus replied, “Have I not chosen you, the Twelve? Yet one of you is a devil!” (He meant Judas, the son of Simon Iscariot, who, though one of the Twelve, was later to betray him.) John 6:70-71.
Then they prayed, “Lord, you know everyone’s heart. Show us which of these two you have chosen to take over this apostolic ministry, which Judas left to go where he belongs.” Then they cast lots, and the lot fell to Matthias; so he was added to the eleven apostles. Acts 1:25.
Suicide is a sin, but it is not why Judas went to hell. Judas went to hell because he never truly put his faith in Jesus. God didn’t make Judas Iscariot betray Jesus, but He foreknew he was going to do it:
Even my own familiar friend in whom I trusted, who ate my bread, has lifted up his heel against me. Psalm 41:9.
As soon as Judas took the bread, Satan entered into him. So Jesus told him, “What you are about to do, do quickly.” John 13:27.
“While I was with them, I protected them and kept them safe by that name you gave me. None has been lost except the one doomed to destruction so that Scripture would be fulfilled.” John 17:12.
And yet it’s mind blowing to realize Judas was used by God to do miracles which pointed others to Jesus:
When Jesus had called the Twelve together, he gave them power and authority to drive out all demons and to cure diseases, and he sent them out to proclaim the kingdom of God and to heal the sick. Luke 9:1-2.
This adds understanding to the dire warning of Jesus, especially for our generation:
Many will say to me on that day, ‘Lord, Lord, did we not prophesy in your name and in your name drive out demons and in your name perform many miracles?’ Then I will tell them plainly, ‘I never knew you. Away from me, you evildoers!’ Matthew 7:22-23.
Nevertheless, as a challenge to all genuine Christians today, I remind us of this promise:
Very truly I tell you, whoever believes in me will do the works I have been doing, and they will do even greater things than these, because I am going to the Father. John 14:12.