Who first despised the christian movement but then later traveled to preach jesus message

Paul or Saul of Tarsus, his Jewish name. At first, he not only despised the Christian movement, but also became the Christians' tormentor, wanting to put them to death. He persecuted Jesus' followers by the time he got back from Jerusalem, where he studied Jewish law, and wanted them to give up their new faith, but instead more people became followers of Christ.

According to the New Testament, after a miraculous apparition from Jesus, after his crucifixion, on his way to Damascus, Paul changed his heart and converted to Christianism. He traveled to many different countries to preach and teach others about Jesus. He shared the Good News about Jesus with Jews and people who were  not Jewish, called Gentiles. None of Jesus' followers contributed as much as he did to establish the bases of the Christian doctrine. He is known as the Apostle of Gentiles and dyed as a martyr because of his belief in Jesus.

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