To focus primarily on preaching to the Gentiles (Acts 9:15).
The Twelve were perfectly capable of that and had, in fact, been ordered by Jesus to do exactly that. But they didn't.
Note that there was no separation, but only fellowship (Galatians 2:9).
The first chapter of Galatians comes just nine verses prior to the single verse you cite. That's the chapter where Paul emphatically states that he is not lying about having not been given his ministry or message by anyone (except God), most especially the twelve apostles.
And just two or three verses before the one you cite specifically and explicitly states not only that the Twelve added nothing to Paul but that there are two gospels!
Because it was the Gospel that he preached, which was the same as the Gospel of Christ (Romans 1:16) and of the other apostles (1 Corinthians 15:11).
Wishful thinking does not make for good theology.
This amounts to nothing but simply restating your position in hopes that someone will take it as a rebuttal of the argument presented.
The fact is that it cannot be the same. Not only did the twelve rescind the great commission but Paul tells us in more than one place that his gospel isn't the same and that he didn't get it from the twelve but instead got it directly from God Himself.
If not for the book of Acts, everyone would think Paul was a heretical lunatic.
Galatians 2:11-16 means that all Christians, whether Jews or Gentiles, should stop trying to keep the letter of the Old Covenant Mosaic law (Galatians 2:16,19,21). For Galatians 2:11-21 is about what the apostle Paul, a Jew (Acts 22:3), said to the apostle Peter, also a Jew (Galatians 2:14), while they were up in Antioch living among Gentile Christians. Before certain men came from Jerusalem, where some Church leaders mistakenly thought that Jews still had to keep the letter of the Old Covenant Mosaic law (Acts 21:17-25), Peter had been rightly living "after the manner of Gentiles, and not as do the Jews" (Galatians 2:14). For he knew the truth that the letter of the Old Covenant Mosaic law was a "yoke" which "neither our fathers nor we [Jews] were able to bear" (Acts 15:10), and that "through the grace of the Lord Jesus Christ we [Jewish Christians] shall be saved, even as they [Gentile Christians]" (Acts 15:11). So in Galatians 2:16, Paul was simply reminding Peter what he already knew.
Paul then went on to show that even Jewish Christians are "dead" to the letter of the Old Covenant Mosaic law (Galatians 2:19), and righteousness does not come even to Jews by trying to keep the letter of the Old Covenant Mosaic law (Galatians 2:21). So Jewish Christians, just as Gentile Christians, must not "frustrate the grace of God" by trying to keep the letter of the Old Covenant Mosaic law:
Galatians 2:21 I do not frustrate the grace of God: for if righteousness come by the law, then Christ is dead in vain.
This is just your doctrine.
I really do not understand how you guys don't see how that isn't a valid response to the argument. It's text book question begging - at best.
In reality it doesn't even qualify as that because it isn't even an actual argument. All you've done here is restate your position in hopes that it'll be taken as a rebuttal argument. If it were taken as that then it would be question begging because your doctrinal interpretation of that passage is only valid if your understanding of Paul's ministry is valid and that's what's being debated. So whether it's taken as an argument or not, it doesn't move the discussion one inch closer to getting any answer to the question of why Paul's ministry existed in the first place.
Of course, I have to remind myself that I can't really expect much else because the whole point of the question "Why Paul" and all of it's various iterations that I've presented is that you don't have any answer for them. You can't possibly have any answer. There isn't any rationally possible answer from within your doctrinal paradigm.
That should be sufficient to cause you to reevaluate the veracity of your doctrine but I know from long experience not to expect any thing approaching that. That seems always to be a bride too far.
Regardless, the seed has been planted. Before you came here (to TOL), you had no idea that Paul ever got in Peter's face about anything; You had no idea that Paul emphasized how distinct his ministry and message was from the Twelve; You probably didn't even know that Paul was called as an Apostle by Jesus Christ Himself and given "his gospel" by direct divine revelation; You had no idea that God sent Paul, by revelation, to the Twelve so as to explain "his gospel" to them and that when they heard it, they decided to drop the great commission for themselves, to stay in Jerusalem to minster to Israel only (i.e. The Circumcision) and that Paul would go to the rest of the world, etc, etc, etc.
Clete