Murder will be impossible after the judgment! The Sabbath was kept prior to it being written down. Pay very close attention in Exodus. Moses knew the Sabbath prior to receiving the Law:
Exo 16:23 And he said unto them, This is that which the LORD hath said, Tomorrow is the rest of the holy sabbath unto the LORD: bake that which ye will bake today, and seethe that ye will seethe; and that which remaineth over lay up for you to be kept until the morning.
The Hebrews kept the Sabbath in the desert. Pay very close attention to the LORD part. Jesus is Lord of the Sabbath, He is the one being revered on Sabbath.
Mat 22:37 Jesus said unto him, Thou shalt love the Lord thy God with all thy heart, and with all thy soul, and with all thy mind. Mat 22:38 This is the first and great commandment. Mat 22:39 And the second is like unto it, Thou shalt love thy neighbor as thyself. Mat 22:40 On these two commandments hang all the law and the prophets.
Note, another mistaked tradition. The Golden rule is actually the Golden rules! The first Golden rule is to love God. How do you love God if you do not do what he says and show Him respect for His Creation by resting on the day He rested! Being God, He did not need rest, He was inventing it to show us how to live.
Luk 6:46 And why call ye me, Lord, Lord, and do not the things which I say?
The wages for sin is Death. That law hasn't changed. The condition of Jesus has given us the gift of God, which is salvation.
There you go again with the sin. If sin remains, then the law remains. All of it. If it is buffet style, or it the Old Testament does not matter, then why not have women priests. Why not have homo priests? You cannot have your cake and eat it, too. Trying to define out what YOU feel is not part of the Law, trying to say Sabbath keeping is not part of the moral Law, it pure man created folly.
Notice it doesn't say, "the gift of God is eternal life through maintaining the law." That's because it can't be done. When SDAist add that you must keep the Sabbath, then Salvation becomes maintained through your works. What is a gift? Something that is given with no strings, or something that is earned? If you earn it, then it's wages.
If a man invites you to his house and asks you to remove your shoes and you refuse and still enter. Will he invite you back? Recall the parable of the wedding:
Mat 22:3 And sent forth his servants to call them that were bidden to the wedding: and they would not come.
The gift is free, but there comes responsibility with this gift.
2Pe 2:21 For it had been better for them not to have known the way of righteousness, than, after they have known it, to turn from the holy commandment delivered unto them.
Luk 12:47 And that servant, which knew his lord's will, and prepared not himself, neither did according to his will, shall be beaten with many stripes.
Again, the whole thing goes to motivation. Trying to earn salvation by not stealing cars is not the way. You could never accept Jesus and never steal, murder, break the Sabbath, worship and idol, etc. Not breaking the Law cannot earn one into heaven. The outward signs of conversion are obedience. If one truly loves the Lord Jesus Christ and accepts His death and resurrection, then one will be motivated to live as He lived. The problem is that we cannot purge the sin out of our lives. Does that mean we shouldn't try, or even worse, basque in sin so that grace may abound? Yea, God forbid, for through faith we establish the law.