Rom 14.1-6 is referring to fasting. Pharisees had two specific days for fasting. Paul is not saying God's Sabbath doesn't matter.
Its not about whether it matters or not but more is a ceremonial (fleshly) law used as a shadow and therefore something that we cannot judge one another with?
I don't think anyone said that the Sabbaths don't have a purpose.Its just as a perfect law..... the Sabbaths could not make him that did the service perfect, as pertaining to the conscience; Which stood
only in meats and drinks?
I think a good understanding of the laws that pertained to the flesh as shadows could aid a person like for instance looking at the verse below.
2Jo 1:7 For many deceivers are entered into the world, who confess not that Jesus Christ is come in "the flesh". This is a deceiver and an antichrist.
I would suggest the whole matter is about judging one another in respect to carnal "fleshly" laws. Therefore I would think having a proper understanding as to the purpose of ceremonial
(fleshly) laws, I believe would be needed if we are to understand nature of the flesh and that would include anyone's flesh regardless of what nation, to include the Jewish nation in whom God formed out of two pagan nations. Abraham's father was Amorite and his mother Hittite . The new Jewish nation was used as types and shadows pointing ahead to new creation, until the time of refomation.... "The renting of the veil."
I would view it in a similar way as when investigating some matters following the money trail $$$$$$$ can help a person come to a proper conclusion. With ceremonial laws, "carnal, fleshly" laws as that in which we are clearly instructed not to judge one another with respect .
In regard to the Judaizers iit would seem they are required to follow the "fleshly" trail
. And gain in this sense, Hebrew seeing it was nation he put together formed of two nations .
Heb 10:20 By a new and "living way", which he hath consecrated for us, through the "veil", that is to say, "his flesh";
The "veil" that represented the temporal "flesh" as a sign to the rebellious Jews Christ has come in the flesh is used in types as metaphors and shadows until the "time of refomation".It which did represent the flesh of the Son of man..... has been rent from the top to the bottom for some time now. When Christ said it was finished it was, the demonstration is over. If it was not there would of been no renting of the "veil" And the Jews would still be sacrifices animals, as shadows, hoping Christ will come in the flesh.
And Jesus cried with a loud voice, and gave up the ghost. And the veil of the temple was rent in twain from the top to the bottom.Mar 15:37
In regards to the idea about fasting.it would seem there is no such thing as a law of fasting two specific days. The reference was in respect to
eating not fasting. It would appear some one made that up?
The foundation of the subject matter is from the last verse in the previous chapter 13 ending with verse 13 of chapter 14.
Rom 13:14 But put ye on the Lord Jesus Christ, and make not provision for the flesh, to fulfil the lusts thereof.
Rom 14:10 But why dost thoujudge thy brother? or why dost thou set at nought thy brother? for we shall all stand before the judgment seat of Christ.
Make not provision for glorying in the "flesh" in respect to carnal fleshly laws that served as shadow until the time of reformation. This is whether they are in respect to Sabbath days or eating.
Its simply follows the same conclusion as other references to carnal fleshly ordinances as shadows that were used until the time of refomation .The veil representing the "flesh" clearly shows the time of refomation had come.
Let no man therefore judge you in meat, or in drink, or in respect of an holyday, or of the new moon, or of the sabbath days: Which are a shadow of things to come; but the body is of Christ. Let no man beguile you of your reward in a voluntary humility and worshipping of angels, intruding into those things which he hath not seen, vainly puffed up by his fleshly mind,Col 2:16
The Holy Ghost this signifying, that the way into the holiest of all was not yet made manifest, while as the first tabernacle was yet standing: Which was a figure for the time then present, in which were offered both gifts and sacrifices, that could not make him that did the service perfect, as pertaining to the conscience; Which stood only in meats and drinks, and divers washings, and "carnal ordinances", imposed on them until the time of reformation. But Christ being come an high priest of good things to come, by a greater and more perfect tabernacle, not made with hands, that is to say, not of this building;Heb 9:8