I would suggest that anyone who wants to understand the problems behind the Sabbathkeeper position should review the thread at the link below and the article associated with it.
The author is a former Seventh Day Adventist.
One of the biggest hindrances for both Sabbathkeepers AND non-observers in understanding this issue is falsely dividing the Ten Commandments from the rest of the Torah. If a Sabbath non-observer maintains that the Ten Commandments as a whole are still applicable, his discussions with Seventh Day Adventists are hindered, as he is displaying an inconsistency.
The key is that the Torah is one unified law. The Ten Commandments occupied a prominent place in the Torah but they were not separate from it. And, particularly, the Sabbath as well as physical circumcision were signs of the Mosaic Covenant. Christians are not under the Mosaic Covenant, and therefore its signs are not applicable to them as binding moral law.
The signs associated with Christians are baptism and the Lord's Supper. Baptism is the one-time entry sign into the New Covenant, similar to physical circumcision (although salvation has already occurred in the baptized person; I do not believe in baptismal regeneration). The Lord's Supper is the continuing, remembrance sign, similar to the Sabbath (Jesus said to observe the Lord's Supper in remembrance of him, and the Sabbath command says to "remember the Sabbath"). Sabbath (and festivals for that matter) were like "anniversaries" or remembrances of the covenant relationship the Israelite had with God under the Mosaic Covenant. See Hosea 2 where God "divorced" Israel and took away her Sabbaths and festivals due to unfaithfulness. It's almost like he was saying...you're no longer my wife, you whore..take my ring off...the Sabbath and festivals were "reminders" of the relationship God had with ancient Israel, much like a ring is the reminder of the marriage covenant between humans. God wouldn't have "taken away" the Sabbath and festivals if they were moral laws...God doesn't take away enduring, moral laws...therefore the Sabbath and festivals are not enduring, moral laws.
And, as Colossians 2:16-17 points out, the Sabbath pointed to Jesus as our spiritual rest. See Matthew 11:28-30 and Hebrews 3-4 in this regard. The "rest of God", which is entering into the faith relationship with Jesus, or, in other words redemption, is displayed here by several types. One is the creation day rest of God...another is the Promised Land of ancient Israel...the Sabbath is another redemptive type, just like physical circumcision is a type of redemption.
Colossians 2:16-17 is powerful in this regard. It is so powerful that SDAs spend a lot of time trying to refute that it is talking about the weekly Sabbath, but it most certainly is. There is no place in the NT where
sabbaton (the word used for Sabbaths) can be conclusively tied to anything other than the weekly Sabbath, yet SDAs attempt to claim that it is referring to something else.
As I've said before, though, I have no issue with Sabbathkeepers as long as they don't claim non-observers are in sin, and that keeping the Sabbath is a requirement, condition or necessary fruit of salvation.
Here's the article I mentioned. Understanding the points in it are very important to being consistent in one's discussion about the Sabbath with observers:
http://christianchat.com/bible-disc...aw-view-how-affects-sdas-torah-observers.html