Did paul witness in Jerusalem

Acts 9:26-30 speaks of Paul's boldness in teaching others about the good news of the Christ in Jerusalem: 26On arriving in Jerusalem he made efforts to join himself to the disciples; but they were all afraid of him, because they did not believe he was a disciple. 27 So Bar′na·bas came to his aid and led him to the apostles, and he told them in detail how on the road he had seen the Lord and that he had spoken to him, and how in Damascus he had spoken boldly in the name of Jesus. 28 And he continued with them, walking in and out at Jerusalem, speaking boldly in the name of the Lord; 29 and he was talking and disputing with the Greek-speaking Jews. But these made attempts to do away with him. 30 When the brothers detected this, they brought him down to Caes·a·re′a and sent him off to Tarsus.