Why did Paul have to bring something totally different from Judaism to the Gentiles?
Paul had to bring something totally different from Judaism to the Gentiles because the law of Israel was given only to the nation of Israel, not to the non-Jewish world. Since God sent him to Gentiles, he could not promote Israel's law, so he carried a distinct message, first to the Jew and then to the Gentile.
Les explains that once law came on the scene with the nation of Israel, it was severe and specifically for that nation. Even after the cross, the early chapters of Acts still contain no gospel of grace in experience. But after Paul is converted on the road to Damascus and appears to Ananias, God reveals He will send this man to the Gentiles. Les teaches that God could not send an apostle to the Gentiles and promote the law of Israel, because that law was only for the nation of Israel. Therefore, if Paul is going to the non-Jewish world, he must go with something totally different than Judaism, even though he goes first to the Jew and then to the Gentile. Les ties this to Galatians chapter two and the dividing of law and grace.