Look at it like this: Acts 15 is to the New Covenant the same way Exodus 20 was to the Mosaic covenant.
Ex 20 gave us the 10 commandments. But then the Lord went on over the next 3 books to give another 603 commands.
IN the same way, God spoke to the apostles and the result was written in Acts 15. It was SPECIFICALLY addressed to gentile believers. If you do NOT believe that then read how James, who gave the ruling, understood it concerning believing Jews in Acts 21.17-26.
The Sabbath is BINDING on the Jews. Not so with gentile believers. BUT, they are free to enter in to the Sabbath and thereby reap its benefits.
In the OT Isaiah 66:23 states explicitly that the Sabbath applies to "
All mankind" in Is 66:23
In Gen 2:1-3 the Sabbath applies to "All mankind" --
Adam and Eve.
In Mark 2:27 the Sabbath applies to "All mankind" -- "
The Sabbath was made for mankind"
In Rev 14:7 it is all mankind that is called to worship God who "
created the heavens and the earth the seas and the springs of water" - a quote from the Sabbath commandment
in Heb 4 "
There remains therefore a Sabbath rest for the people God" actually quotes the Sabbath Commandment and says it 'remains' just as it was in Psalms 95.
In Rev 14:12 the saints
"KEEP the commandments of God and their faith in Jesus".
In 56:1-8 the Gentiles are singled out and specifically blessed for keeping the weekly Sabbath.
James 2 points specifically to the TEN Commandments and says that the common element that would make us "guilty of all" is based on "He who said" -- and as it turns out God said all ten of them not just nine.
In Eph 6:2 - the entire unit of TEN is being identified when the text says "Honor thy father and mother for this is the FIRST commandment with a promise" -- that requires a specific unit of Law -- and is only true of the TEN.
Ex 20:8-11 it is
BOTH Israel AND the gentile that "stays within their gates" that is bound to keep the Sabbath.
In Acts 18:4
both Gentiles AND Jews are worshiping "every Sabbath" so also in Acts 17:1-4 so also in Acts 13.
In your own statement you admit that the Jews would have known that the TEN Commandments - including the 4th Commandment were included in the "LAW of God" - so then when Jeremiah says that the NEW Covenant includes God writing His "LAW on our heart and mind" both Jeremiah and HIS readers would have known that it was sin to violate the Sabbath and that the 4th Commandment was included in God's moral LAW.
That is in the Messianic Kingdom (some call the "millennium")
There is no mention of millennium or "Not valid now" in fact Isaiah 66 comes after Isaiah 56 where gentiles are specifically blessed for keeping the Sabbath.
(Mark 2:27)
Not what it says. It says it was made for man (as a blessing) and men not made to serve it.
Nothing in Mark 2:27 about "not serving" rather the text that has this law as a blessing for mankind just as ALL of God's LAW is said to be "good" .. 'Holy Just and GOOD" and intended for "LIFE". The idea of "LAW as a blessing - so that you are blessed in rebellion against that LAW" is not a doctrine found in all of scripture.
Again referring to the Messianic kingdom.
Referring to us Messianic Jews.
Per Acts 21, the relaxation of the Mosaic commands that was granted to the Gentiles in Acts 15 does not apply to Jews. So it is the Messianic Jews that KEEP the Commandments (all 613) and carry the testimony of the Messiah.
Nothing in Rev 14 is restricted to Messianic Jews.
1 Cor 7:19 "what matters is Keeping the Commandments of God" not at all restricted to "Messianic Jews".
Rom 3:31 "do we then make void the LAW of GOD by our faith? God forbid! In fact we ESTABLISH the LAW of God" - not at all limited to "Messianic Jews"
Of course. There is a great blessing in keeping the Sabbath. But a blessing for doing something is very different than that thing being REQUIRED.
Turns out - the TEN Commandments are the LAW of God. Even the OT admits this.
James 1.1 James, a bond-servant of God and of the Lord Jesus Christ, To the twelve tribes who are dispersed abroad: Greetings.
He was writing to Messianic Jews.
James does not exclude any Christian from his text and there is no cutting up the NT by gentile Christians trying to avoid what Messianic Jews would like to reserve just to themselves. I pointed you to the reference thread where it is shown that the vast majority of even pro-sunday Christians scholars 'get' this Bible detail.
Romans 2 "to the Jew first and then to the gentile" makes no provision for "some of the Ten Commandments do not apply to gentiles". And as we all know - there were no "Messianic Jews" in Genesis 2:1-3 when all mankind keeps the Sabbath. And we all agree that in Is 66:23 "all mankind" is keeping the Sabbath -- not just messianic Jews.
Yes. But are YOU "within the gates" of the Jewish people? If not ......
A great many gentiles at the time of Moses were pagans. So they were worshiping false gods .. the ones 'within the gates' of Israel were in a position to know about the one True God and about the TEN Commandments.
I have to keep the Sabbath (and am happy to do so) because I am within the Messianic Jewish "gate."
So then is it a blessing or... "a burden"? 1 John 5:2-4 says it is not a burden.
To him that "knows to do right and does it not - to him it is sin" this is how the obligation applies to gentiles.