If God had intended for Gentiles to keep the seventh day Sabbath He would not have specified that it was given to the children of Israel, twice.
God made it very clear in the 4th commandment that the Sabbath is for everyone and Jesus reminds us of this fact. Mark 2:27.
Exodus 20: 8 “Remember the Sabbath day, to keep it holy. 9 Six days you shall labor and do all your work, 10 but the seventh day
is the Sabbath of the Lord your God.
In it you shall do no work: you, nor your son, nor your daughter, nor your male servant, nor your female servant, nor your cattle, nor your stranger who is within your gates. 11 For
in six days the Lord made the heavens and the earth, the sea, and all that
is in them, and rested the seventh day. Therefore the Lord blessed the Sabbath day and hallowed it.
And we are reminded again the Sabbath is made for everyone.
Isaiah 56:6 “
Also the sons of the foreigner
Who join themselves to the Lord, to serve Him,
And to love the name of the Lord, to be His servants—
Everyone who keeps from defiling the Sabbath,
And holds fast My covenant
Which is why not only the descendants from Israel will be honoring the Sabbath by worshipping the Lord for eternity Isaiah 66:23 but instead the saints who keep the commandments of God and faith in Jesus. Revelation 14:12
All covenants God made were made with the house of Israel- God's laws are written into the hearts and minds of His people Hebrews 8:10 Israel is just a name God gave to identify His people and His people are those who follow His Word in faith and all nationalities are welcomed in God's New Covenant promise; Gal 3:26-28. One God, one people with His laws written in the heart and minds- kept through faith and love.
If you agree we need to keep even one of the Ten Commandments today like thou shalt not have any other gods before Me, then we need to keep all of them, because we cannot add or subtract from God's commandments Deut 4:2. The Ten Commandments is the work of God Exodus 32:16 and never is the Sabbath described as the Sabbath of the Jews. God said it is
My holy day and
the day to honor Him Exodus 20:10, Isaiah 58:13. This is God's will for us, He spoke it, He wrote it and said we can not add or subtract from it. We all have a choice we can either keep God's commandments which is love to God 1 John 5:3, Exodus 20:6 or we follow man's traditions where there is no commandments to keep any other day, God never sanctified any other day, it is the day man assigned to God that God said is a working day Exodus 20:9 not the day God sanctified and blessed and is holy to God and God made holy for us since we are made in His image to follow Him. Exodus 2:8-11, Genesis 2:1-3 Jesus warned us of this very thing and condemned those who follow mans traditions over the commandments of God quoting right from the Ten. Matthew 15:3-9
Jesus is coming back soon and we are told we must worship Him in Truth and Spirit John 4:23-24 and those who keep not His commandments, there is no truth. 1 John 2:3-5 which comes with a warning Revelation 22:15
We are told the Second Coming will be much like the days of Noah. No one believed Noah either- I pray we all make better decisions so we can enter into the gates of Heaven Revelation 22:14-15 and forever be with Jesus.