According to the bible, Judas and Peter were two different people that both betrayed Jesus, fulfilling the prophecy that Jesus would be denied.
The apostle Paul probably had the greatest influence on Christianity.
Russian Orthodox Christianity
Christianity
The role that the disciples played in the development of Christianity included establishment of the church such as that began by Peter.
Peter and Paul were very active spreading Christianity. They took it to Europe and Peter dies in Rome.
Simon Peter was a Jew. Judaism and Christianity did not come to be considered different religions until long after Peter was dead.
All of the apostles and Jesus were Jewish, however, they began Christianity.
Simon Peter
Disney has influenced the cultural development with his films such as Bambi and Peter Pan.
After the Edict of Milan in 313 AD, Christianity became an official religion along with all the others. Note that in 313 it was an official religion, it was not the official religion until 380 AD.
Peter was born Jewish, as were most (if not all) of Christ's immediate disciples. He was one of the founders of the Christian faith, but Christianity did not spit from judaism and become an organized religion in its own right until long after Peter's death. Peter would likely have considered himself to be a member of a Jewish sect based on the teachings of Jesus.