I am amazed that you are so quickly turning away from him who called you by the mercy of Christ, to some different good news??7 not that there is any other, only that there are some people who are trying to unsettle you and want to turn the good news of the Christ around.

but I did not see any other apostle, except James, the Lord's brother.

The other Jewish Christians followed his example in concealing their real views, so that even Barnabas was carried away by their pose.