The Hinge on the New Perspective of Paul Rests mainly on the new 15th century understanding or reformers that Old Covenant Judaism was a “works based salvation.” The ‘New Perspective on Paul’, which is a protestant new prospective on how to understand the writings of the Evangelist Paul, who was a hightly learned Rabbi, understood the Old Covenant Judaism as one of Grace 1st, then Faith, through Circumcision and obedience to the ordinances of the Law to stay in that covenantal Relationship.
The works of E.P. Sanders "Paul and Palestinian Judaism" Comments of and relating to Covenantal Nomism. That Judaism
Was a Grace based Covenant and that to enter into it one must be circumcised, pass on their faith to their heirs and do the works associated with the covenant to stay in covenant"
E.P. Sanders “Covenantal nomism, in opposition to merit theology, is the belief that 1st century Jews in the land of Israel did not believe in works righteousness. Essentially, it is the belief that one is brought into the Abrahamic covenant through birth and stays in the covenant through works.” Source wiki. Also E.P. Sanders work “Paul and Palestinian Judaism”
The realization that Paul was not speaking against all works but simply works of the Law is at the heart of New Pauline Perspective. It is plain (to those who fallow the new perspective) when understood in its historical context, that the reformers turned upside down the orthodox teachings of the church, reformers, who were rightly looking for reforms within the Catholic Church, made mistakes in their interpretations. Abandoning the reality of who Saint Paul was, and the world he lived in, in unity by necessity of revolting, the sacred teachings preserved by the Church, and under the pressures of secular powers challenged and apposed by virtue of theses misconceptions, those sacred teachings were abandoned. Reforms were made within the church however that did not abandon the original interpretations.
ling for reformation inside the Church
http://www.newadvent.org/cathen/04437a.htm
The Framework of the New Perspective on Paul it that in opposition to the OLD Framework (Protestant) that Salvation in OLD Covenant Judaism was works based identifies that belief to be a false assumption and that Old Covenant Judaism is in fact and always has been, Grace Based, faith based and Obedience based.
In addition to this perspective which is a direct assault on precepts of the reformation, the new perspective on Paul suggests that Saint Paul, being a Jew with a 1st Century Jewish mentality, understood that you must enter into the New Covenant, Maintain your covenantal commitment, and remain in covenant in order to be Saved.