You will note that Paul observed the 7th day Sabbath for one and one half years, implying that, after that, he did not. The spoken of are "Judaizers," so of course they would have wanted to celebrate Shabbat on the 7th day. It's well-known that the proto-church continued to meet in the temple...
Paul, the Apostle on the Ten Commandments in the life of the biblical Christian:
The TEN COMMANDMENTS...
[01.] For though there be that are called gods, whether in heaven or in earth, (as there be gods many, and lords many,) [1 Corinthians 8:5] But to us [there is but] one God, the Father, of...
How did Paul feel about the Ten Commandments, the Law, in other places?
“...Honour thy father and mother; (which is the first commandment with promise; ) [Ephesians 6:2]
“...the law [is] good, if a man use it lawfully ...” [1 Timothy 1:8;p]
“For if I build again the things which I destroyed...
If you define it based on initial feelings. It's unnatural. (Wait a second; I'm on a forum with people who don't seem to understand this term beyond their own initial feelings.) It's unclean, or sin, or evil, or unlawful, or against God. Whatever term you actually understand. Combine them all...