Paul called those people that said we are to follow the law of Moses after coming to Christ as being Judaizers. They say it is a sin if we don't follow what God commanded in Moses. This comes in many forms from diet restrictions to keeping holy days and the feasts as they do.
Judaizers will say that you are sinning if you don't follow the Law of Moses which means strict adherence to the 10 commandments as "they deem them to be". Living by the letter of the law and not the spirit. Paul says that he never stood for this for even one hour so that the truth would remain in the Galatians.
We live by the life of Christ as believers and His life fulfills the intent of the law.
Judaizers will say that you are sinning if you don't follow the Law of Moses which means strict adherence to the 10 commandments as "they deem them to be". Living by the letter of the law and not the spirit. Paul says that he never stood for this for even one hour so that the truth would remain in the Galatians.
We live by the life of Christ as believers and His life fulfills the intent of the law.