A Sermon on Romans 3:29-31
Or is God the God of Jews only? Is he not the God of Gentiles also? Yes, of Gentiles also, since God is one—who will justify the circumcised by faith and the uncircumcised through faith. Do we then overthrow the law by this faith? By no means! On the contrary, we uphold the law. (ESV)
Second deduction; no difference between Jews and Gentiles in the way of salvation; 'by' and 'through'; no compromise with other religions; the gospel the only basis of fellowship.