Were the Corinthians Paul wrote to Jews or Gentiles?
The Corinthians were Gentiles. Paul, designated the apostle of the Gentiles, addressed his letter to them. The context contrasts Jesus dealing with the Jew and Peter and the eleven as apostles of the Jew, while Paul comes on the scene as the apostle of the Gentiles. Therefore, the Corinthian recipients were Gentile believers.
Les explains that Paul is writing to the Corinthians, and he asks what kind of people they were, answering Gentiles. He emphasizes that Jesus dealt with the Jew, Peter and the eleven were apostles of the Jew, while Paul comes on the scene as the apostle of the Gentiles. Therefore, when Paul writes to the Corinthians, he is writing to Gentile believers, not Jews.
For the love of Christ constraineth us; because we thus judge, that if one died for all, then were all dead: