Which Law Are We Under? Not Both!

There is confusion today about the role of the Law of Moses in the Christian salvation.
Some Christians are keeping the Sabbath. Some, the seven feast days. Some are circumcising their children. Some do not eat pork.
What shall we say about these Christians? As long as they feel they are obeying God they should continue keeping those parts of the Law, although such observances are not required. Whatever is not of faith is sin!
Paul must turn over in his grave at Christians trying to keep parts of the Law of Moses. Paul had some strong things to say about the Judaizers who were trying to bring the Christian under the Law of Moses.
We can tell from Paul’s writings that he was thoroughly disgusted if not angry with those who were emphasizing to the Christian believers parts of the Law of Moses.
Neither circumcision nor uncircumcision means anything; what counts is the new creation. (Galatians 6:15)
As for those agitators, I wish they would go the whole way and emasculate themselves! (Galatians 5:12)
We who do not observe any part of the Law of Moses should not condemn those who do; nor should those who do keep the Sabbath or some other part of the Law, condemn us who do not keep any part of the Law.
Before the coming of this faith, we were held in custody under the law, locked up until the faith that was to come would be revealed. So the law was our guardian until Christ came that we might be justified by faith. Now that this faith has come, we are no longer under a guardian. (Galatians 3:23-25)