1. Acts 9:26 (ESV)
  2. Exposition

Why were the Christians in Jerusalem scared of Saul?

Acts 9:26 (ESV)

26 And when he had come to Jerusalem, he attempted to join the disciples. And they were all afraid of him, for they did not believe that he was a disciple.

Christian believers in Jerusalem would very naturally be scared of Saul since he is the one who orchestrated the arrest of their friends and family (see Acts 8:1–4).