What were the believing Jews in Jerusalem like regarding the Law and the temple?

Les explains that the believing Jews in Jerusalem who were under Peter’s control had maintained a separation, yet they were still temple worshipers. They were still legalistic Jews, but they had recognized Christ as the Messiah. Peter himself demonstrated this law-keeping mindset. In his vision of the sheet with creatures, the Lord commanded him to rise, kill, and eat, but Peter refused, saying he had never eaten anything unclean because he was a Law-keeping Jew who required kosher food. Later, when he went to Cornelius’s house, he still had trepidation. Les pictures the journey from Joppa to Cornelius’s house, some 80–90 miles up the coast, as one where the Lord had to push Peter along, like Jonah, because he did not want to go. At Cornelius’s door, Peter said it was an unlawful thing for him, a Jew, to keep company with a man of another nation. Les concludes that Peter was not set free; he was still a Law-keeping Jew, just like those same kind of believing Jews in Jerusalem who maintained separation but were still temple worshipers and legalistic, while recognizing Christ as the Messiah. Then in Acts 15:1, certain men came down from Judea.