Peter - the Gospel OF the circumcision
Paul - the Gospel OF the UNcircumcision.
No such thing
The argument between Paul and Peter, as described in Acts 15:1-2, was about whether or not Gentile Christians needed to follow Jewish customs, such as circumcision, in order to be saved. Peter had initially been eating and socializing freely with Gentile Christians, but when some Jewish Christians arrived, he began to separate himself, fearing criticism from those who held to Jewish customs.
Paul confronted Peter about his hypocrisy, arguing that salvation was by faith in Jesus Christ alone, not by adherence to Jewish laws and customs. Paul believed that Gentile Christians should not be burdened with Jewish traditions that were not necessary for salvation. Eventually, Peter and the other apostles came to agree with Paul's argument, resulting in a decision by the early church leaders that Gentile Christians did not need to follow Jewish customs in order to be saved.
