Sabbath-keeping with all it's rules and regulations, was part of a covenant with Israel that is not applicable to Christians under the New Covenant. Even when Christians set out to worship on the Sabbath, they aren’t truly "keeping the Sabbath." To "keep the Sabbath" as it was required in the Old Testament would involve compliance with stringent regulations (Exodus 16:23; 35:3; Leviticus 23:32; Jeremiah 17:21) that were strictly enforced.
I am sure you know Biblical Law, so let me ask. Just why was the passages you gave so stringent?
If Sabbath-day observances are still required, so would the burnt offerings which went along with them (Leviticus 19:30; 23:2-3; Numbers 28:1-10; 29:39-40; I Chronicles. 23:30-31; II Chronicles 31:2-4; Isaiah 1:13). These were commanded by God to the sons of Israel. If the seventh-day Sabbath is still in affect, then why do not the Sabbatarians seek to obey ALL that the LORD commanded? How can a person say he keeps a certain law when he keeps only part of it?
So please tell me all the laws that regulate the Sacrifices, also please tell me just when HaShem Himself said He did not want them.
If the Sabbath-day laws were still in effect today, then according to Exodus 31:12-18; 35:1-3; and Numbers 15:32-36, anyone who profaned the Sabbath was put to death and any person who does any work on it, that person shall be cut off from his people. Who is going to enforce that? The Jewish synagogue? The Christian Church? The Seventh-day Adventist church? Or the State? Since we do not live under a theocratic state as ancient Israel did, no Sabbatarian can live consistently under the Mosaic regulations.
Is that not what the second death is about? If you will note, the Torah doesn't say they will be put to death at once, only that they will be.
St. Paul said in Galatians 4:9-11: "...You observe days and months and seasons and years. I fear for you, that perhaps I have labored over you in vain."
Your quote of Paul is a bit incomplete don't you think? To place it in context, you need to start reading in 8. Then you will find that Paul is talking not the Sabbath, rather he is talking of going back into idolitry, and failing back into trying to earn salvation in a manner that is sinful.
In Romans 14:1-23, the Apostle Paul says: "... One man regards one day above another, another regards every day alike. Let each man be fully convinced in his own mind...(NASB)." In other words, for the Christian, the Apostle is saying that no day is to be regarded holier than another. Although the Torah was read every Saturday in the synagogues, the early Gentile Christians were never commanded to be circumcised, or to rest on Saturday as the Jews were (Acts 15:1-21).
True we are not commanded to be circumcised. At lest not in the flesh. That is a sign of the covenant with Avraham, not the Gentile. Yet funny how the Sabbath was given before man was removed from the Garden. Gen.2:2-3. That being said, one can't say it is for the Jewish people only.
In Colossians 2:16-17, the Apostle Paul also said 16 Therefore no one is to act as your judge in regard to food or drink or in respect to a festival or a new moon or a Sabbath day 17 things which are a mere shadow of what is to come; but the substance belongs to Christ.
If one wishes to place this in it's true context, then one should learn why the word is used in the plural, and not the singular.
Col 2:16 So don’t let anyone condemn you for what you eat or drink, or for not celebrating certain holy days or new moon ceremonies or Sabbaths.
I give you that this not true in all translations. Yet if we look it up in more than one, we find it is, more often true than not true. This should lead one to seek out what was said in the Greek. Doing that brings us back to the plural use of the word Sabbath's. Now we know that Paul didn't have a new testament to use, and that if he was to teach contrary to the Tanakh, He would have been teaching falsely. So let me ask, being as you understand the Law so well, Why would Paul say SABBATH'S and not Sabbath? Hint, read Lev. chapter 23.
There you will find that every feast has at lest one Sabbath that is not the 7th day Sabbath. This is what he was talking of.
I willl tell you now, I am willing to talk this out with you. however, you must remain respectful, you must show me where in the Bible any law has been removed, and most importantly, you ust explain away Mat. 5:17-18.