With all due respect, you don’t understand grace, then. Grace does not free anyone from the obligation to obey the law (Romans 3:31); it frees us from the death penalty incurred from prior disobedience to it—otherwise there would be no need for repentance to receive grace. Jesus was adamant about that when He said (in John 14:15) “If you love Me, obey My commandments” (talking about those commands/laws outlined in Exodus 20 and Deuteronomy 5).
Oh, true grace WILL conform to the outline of the law. They come from the same spirit. However law framed as it is in man’s words, can be evaded if we stop there. It is the old “wrapping Jello in chicken wire” problem.
And no, that is lousy New Testament theology to hark at least Gentile Christians back to the Mosaic law. Acts 15.
And more to the point, we are speaking of divinely given law in any case. If we apply the same honor to human law then in fact, we have idolized it.