you are taking these verses way out of context.
Act 9:26 was just after his conversion and the disciples in Judah didnt know about it so were rightly afraid of him. He was formerly the persecutor of them.... but if you keep going in that passage you see that they did accept him and took them in among themselves.
Acts 9:26 'On arriving in Jerusalem, he made efforts to join 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 So he remained with them, moving about freely in Jerusalem, speaking boldly in the name of the Lord.
29 He was talking and disputing with the Greek-speaking Jews, but these made attempts to do away with him.
30 When the brothers found out about this, they brought him down to Caes·a·re′a and sent him off to Tarsus.
It was the jews who were trying to kill Paul, and it was the Christians who protected him by getting him out of Jerusalem and of to Tarsus safely.