Note 15 at Gal. 2:7: Instead of Peter, James, and John correcting Paul's gospel, they approved it and encouraged Paul in his work. Paul was citing this as an additional proof that the gospel he preached to the Galatians was correct and the additions that the legalistic Jews were trying to add to his gospel were wrong.

Note 16 at Gal. 2:7: There were not two different gospels preached by Peter and Paul-a gospel of the circumcision and a gospel of the uncircumcision. There is only one true gospel, as stated very emphatically by Paul earlier in Galatians 1:6-7. God was simply using Peter in a mighty way among the Jews and God was using Paul in a mighty way among the Gentiles.

The term "the right hands of fellowship" (v. 9) implies a united missionary partnership to work together for the spreading of the gospel among Jews and Gentiles. Peter took the good news of salvation primarily to the Jews and Paul ministered primarily to the Gentiles.