From the Gospels we know that Judas betrayed the Lord. But we do not know the extent. Neither do we know what he motivations were.
It is conceivable that he may have been mislead by the leading Jews of his day into betraying Jesus, not knowing that he would be condemned to death. Perhaps he thought the Lord would have been let off with a stern warning. We simply do not know, yet we have condemned him on hear say evidence which is not permissible in any civilised court of law!
What is obvious from the Gospels is that he was so horrified and mortified on learning of the Lord’s fate, that he could not face the consequences, went away and hanged himself.
That does rather suggest he did not expect to the Lord to be so harshly sentenced. It also shows remorse, great grief and tribulation for what he had done.
Have we been a bit harsh in judging him when we know neither the facts or the mitigating circumstances?
Do we have a duty of care to pray for him?