What does it really me "persecuting me"? How come Saul was persecuting Jesus who was already sitting on the Heavenly throne? But it is clear that this question is not about persecuting others but namely Jesus Chist, the Son of God.
Acts 9 (and repeated in Acts 22 and 26) has been much flattened by the “mainstream” explanation that Jesus merely identifies himself with his followers. That is not false on the surface, but it is shallow. Let’s unpack a better interpretation.