Judas was taught by Jesus and he failed.Oh?
Looks like to me that he SUCCEEDED!
The NT suggests that Judas is apparently bound up with the fulfillment of God's purposes ...
John 13:18
“I am not referring to all of you; I know those I have chosen. But this is to fulfill this passage of Scripture: ‘He who shared my bread has turned against me.
John 17:12
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.
Matthew 26:23
Jesus replied, “The one who has dipped his hand into the bowl with me will betray me. The Son of Man will go just as it is written about him.
Matthew 27:9-66
Then what was spoken by Jeremiah the prophet was fulfilled: “They took the thirty pieces of silver, the price set on him by the people of Israel, and they used them to buy the potter’s field, as the Lord commanded me.”
Acts 1:16
and said, “Brothers and sisters, the Scripture had to be fulfilled in which the Holy Spirit spoke long ago through David concerning Judas, who served as guide for those who arrested Jesus.