Answer:
Simon was a zealot before becoming a disciple of Jesus.
Step-by-step explanation:
"In the play The Last Days of Judas Iscariot, Simon the Zealot is a witness for the defense at the trial of Judas Iscariot in Purgatory. In the miniseries Jesus of Nazareth, before joining the Apostles he is portrayed first as a member of the Zealots, hence his name."