Some (hyper-dispensationalists) teach that this letter should not be appropriated by Gentiles because Peter was an apostle to the Jews and Paul to the Gentiles (Gal. 2:8-9). While Peter and Paul did make this agreement in Galatians 2, this was not a hard and fast designation of fields of ministry. We know that Paul continued to minister to and evangelize Jews after that (which took place early in his ministry) so we can easily conclude that Peter also continued to minister and evangelize Gentiles when the opportunity arose. Remember that it was Peter who first went to the Gentiles (Acts 10) and who stood up for Gentile inclusion in the church at the Jerusalem council (Acts 15). So just as we wouldn’t say this book was only relevant to ancient Christians, we shouldn’t be so quick to dismiss the understanding that this letter belongs to the church as a whole, not just to Jews.