The Jews did not turn Judas. He did it voluntarily. However, the Jews jumped at the opportunity as they had been seeking a way to arrest Jesus.
Judas lead the Jews and priests to arrest Jesus.
Judas
So that he could be crucified by the Jews and so die for our sins - see: Acts 2.23 - " Him, being delivered by the determinate counsel and foreknowledge of God, ye have taken, and by wicked hands have crucified and slain":
In the garden of Gethsemane Judas said nothing to Jesus, but had told the guards that the man that he kisses on the cheek is to be arressted. Jesus replied to Judas after the kiss, "You betray the Son of Man with a kiss?"
Judas betrayed Jesus once. Peter denied Jesus 3 times.
Jesus had two disciples called Judas. One was Judas Iscariot, the other was just called Judas. Judas Iscariot is not known as Jesus brother, actually, he was the follower of Jesus that betrayed him to the Pharisees.
While Judas played a role in the events leading to Jesus's crucifixion, it was ultimately part of God's plan for salvation. Judas's betrayal was a result of his own choices and actions, and he is often viewed as evil because of his deceit and betrayal of trust. His actions were driven by greed and selfishness, which are typically seen as negative characteristics.
Judas iscariot betrays Jesus
Judas Iscariot
The disciple who betrayed Jesus was Judas Iscariot.
no Judas did not arrest Jesus he told the Jewish council where Jesus would be for a reward of money
Not normally, because there were two disciples of Jesus with the names Judas. The Judas that betrays Jesus is generally called Judas iscariot so you can tell them apart.