Who was Saul going to Damascus to arrest?

Les teaches that at the height of Saul's rebellion, he was on his way into Gentile territory up to Damascus, not to arrest Gentiles but Jews. Saul went to the synagogue hoping to bring believing Jews back to Jerusalem, that they might be imprisoned or put to death because they followed what he thought was an imposter. Just outside that Gentile city, on Gentile ground, God in grace saved this 'raging bull for His religion' and informed him he would be sent to the Gentiles. Les explains this is the first indication in Acts that God would bring Gentiles into the picture, though the Old Testament was full of it. Only through Israel was Israel to be a light to the Gentiles, and Israel's Messiah to be the light. But since Israel had seven years of constantly rejecting Peter and the eleven and their appeal, God set the nation aside. In a few years Roman armies destroyed the temple and Jerusalem, and the Jewish people went into dispersion until our generation, returning since the early 1900s, becoming a sovereign state in 1948, with events getting ready for the fulfillment of the prophetic Word, though no prophecy is directed to the church.