This same Spirit teaches us to love. This precludes adultery.
And, as Christ and the Apostles said, love is the fulfillment of the law.
However this Spirit did not teach me anything about keeping the Sabbath holy, according to modern man's rubrics.
Nothing is according to "man's rubrics."
Come unto me all ye who labor and are heavy laden, and I will give you rest. There's commandments One through Four.
But all of this still does not touch on the OP, summarized as:
1. When any part of the Law passes away it all passes away - together.
Well then there is no law against adultery.
But the premise is false. All the law was not given at the same time nor in the same manner. There is a law that will stand as long as the earth is seen to stand. It was established as part of the creation, Gen. 2:3; and was written in the hearts of the gentiles before Moses, Rom. 1:19-32; 2:14-15.
These things are holy, just, good, (Rom. 7:12) and spiritual (Rom. 7:14). And that which is spiritual is eternal, 2 Cor. 4:18.
But there is a commandment that was carnal and temporary, (Heb. 7:16) and that was the commandment that created the Levitical tabernacle, priesthood and offerings, Heb. 7:5-14. That is the law that has changed, Heb. 7:12. It could be changed because it was carnal and temporary.
So, right there in the Scriptures where you have argued there is no division in the law, it's plastered all over the pages of the Bible in a manner so obvious that a child could discern it: The moral law is spiritual, and the ceremonial law is carnal.
2. When that does happen - and I believe it did, since the means of keeping that Law is now gone. . .
It was gone around 600 B.C., too, but that isn't what determines whether or not the ceremonial law is in effect. Christ determines that, and it was the Cross which took it away, not the destruction of Jerusalem.
All of this (except for the parenthetical part of #2) is clearly stated in Matt. 5:17-18.
When Christ comments on the law, it is clearly the moral law. He talks about anger and murder and lust and adultery, not robes, priests and sacrifices.
In the New Testament, when Paul speaks of the law, he is sometimes speaking of the moral law, which he said was spiritual, and sometimes he speaks of the ceremonial law, which he said was carnal. The end, or fulfillment of the moral law is
charity out of a pure heart, and of a good conscience, and of faith unfeigned. When love fails, then the commandment will fail.
But this nonsense you're spewing is swerving from that, and you're being
turned aside unto vain jangling.