If Jesus had said "all mankind", you would have a good point.
Jesus Is Lord of the Sabbath
23 One Sabbath Jesus was going through the grainfields, and as his disciples walked along, they began to pick some heads of grain. 24 The Pharisees said to him, “Look, why are they doing what is unlawful on the Sabbath?”
25 He answered, “Have you never read what David did when he and his companions were hungry and in need? 26 In the days of Abiathar the high priest, he entered the house of God and ate the consecrated bread, which is lawful only for priests to eat. And he also gave some to his companions.” 27 Then he said to them, “The Sabbath was made for man, not man for the Sabbath. 28 So the Son of Man is Lord even of the Sabbath.”
Who was here besides Jewish people? Would the disciples and the Pharisees hearing this understand it to mean "mankind" instead of "man"?
The Sabbath was made for a specific "man", as we have seen in Exodus 31 and other places . The Sabbath was not made for God, but man. The Sabbath is not eternal, as it was "made". Jesus is not addressing the origions of the Sabbath, but how it should be observed. Jesus here compares the Sabbath rules to other ceremonial rules such as eating shewbread, which all ceased at the cross. Jesus is not subject to the Sabbath, but the other way around. We are now in Jesus as a hier and as such we are no longer subject to the Sabbath either.
You sure place a lot of importance on this passage that doesn't even say what you want it too.
You deny the fact that Sabbath was established at the 7th day of creation, and use your logic, for whom it was made? For Israel 2,300 years later? When Adam and Eve was created there is no Israel and never would be if they didn't fall in sin.
Or, Sabbath was blessed and made holy for God? Be logic!
God wants that Adam, Eve and their descendant labors for 6 days as he has labored and rest on the 7th day as he has rested, and enter a holy convocation to remember that the whole world was created in 6 days.
And remember that even before the law was written in Sinai, God already instructed Moses to bring away Israel out of slavery in Egypt in order they might serve him, might makes burn offerings and might keep the Sabbath as their ancestor did. This is too simple logic.
And his message to his disciples that they must keep praying so that the destruction day of the temple in Jerusalem would not fall on Sabbath was a clear and plain teaching that Christ never intended to stop the Sabbath law keeping, not for his discples, not for those later named Christians. This too is simple logic.
Gods chose Israel among the nation on earth to carry on with his law and redemption plan, that's why the Sabbath instruction, the 10 Cs, the ceremonial law was exclusively for them at that time, to make a difference between them and the pagan people scattered in the world. And God had chosen Israel since He made his covenant with Abraham whom He said is a righteous man and did his law and commandments, which for sure also did the Sabbath keeping, and God carried it on till Moses, the father of Israel. So, don't think Sabbath is for Israel only. This is too common sense.
Finally, when Jesus said that Sabbath was made for man, the point is not that Sabbath is for Israel, or how to serve God on Sabbath,
but that Sabbath was established to be a blessing for man,
and Him that blessed the Sabbath is the Creator of the Sabbath, Lord of the Sabbath. And Sabbath to be a blessing for man, originated from Eden, at the 7th day, to be a blessing for Adam and his family. This too is simple logic.
With all these simple logic and Scripture support, do you still think that Sabbath is only for Israel, not for Adam, not for you - Christ disciples, if you are one?
Broaden your horizon of thinking.