Galatians and gospel logic

Since I put up the page from my book on the gospel yesterday, which starts by looking at Paul's letter to the Galatians, I will start going through that book's use of the word 'gospel' first.

In the meantime, I mentioned in an earlier post that the number of people holding to a group 'C' view of the gospel (neither Justification by faith or Justice of the the Kingdom, but the saving story of Jesus himself). Well, I'm finding even more examples of this! Peter Enns' post alerted me to something David Williams wrote on gospel logic in Galatians. While he also touches on what I wrote in Group 'C' and the 3rd 'J' his main point is that Paul is not telling the Galatian church what the gospel is, but how they have misapplied it and misunderstood its logical effects in relation to ethnic Israel, the law, and circumcision.

The primary point Williams drives home is that their actions are denying the change the gospel brings regarding the rituals of the Law (Torah/Law of Moses) having lost their governing function over God's people.

This is the logic of the gospel:

If the Messiah was crucified, then the Torah is no longer binding for the Messiah’s people.

The Messiah was crucified (the gospel).

Therefore, the Torah is no longer binding for the Messiah’s people.

 But the Galatians' actions say they believe this:

 If the Messiah was crucified, then the Torah is no longer binding for the Messiah’s people.

It is not the case that the Torah is no longer binding for the Messiah’s people (hence, that is why we’re being circumcised).

Therefore, the Messiah was not crucified (perversion of the gospel).

The thrust of this argument from Paul can be found in 2:21b-3:1.

The more I read Galatians the more I see the interesting parallel to Romans, which has convinced me that Romans is also about Jew and Gentile being one people in the Messiah.

Any thoughts on this?