Exodus 16 and Exodus 20 don’t say what you think they say: Ex 16 is the first time God ever commands a weekly Sabbath to humans, and He explicitly says, “Tomorrow is a sabbath” — future tense — because Israel had never kept one before; Ex 20 grounds the Sinai Sabbath in creation as analogy, not as a prior command (“for in six days the LORD made…”), exactly the way Deut 5 grounds the same command in the Exodus — two different grounds for the same Israel‑only covenant sign. There is no contradiction in saying “Sabbath is for human good” and “Sabbath was given to Israel,” because all God’s laws for Israel were for human good, but not all were universal moral law. Jesus is correcting Pharisees about their covenant sign, not imposing Sinai on Gentiles; if He were, Paul could not say every day alike, could not call Sabbaths shadows, and the apostles could not omit Sabbath from Acts 15. Ex 16 shows the first giving; Ex 31 shows the covenant sign; the NT shows the shadow fulfilled.You have never read Exo 16 have you? OR 20:8-11
And BTW, why say the sabbath was given for HUMAN good out of one corner of your mouth while saying it is for the Jews only out the other side?
Maybe with the next response you can use scripture to support your view instead of accusations.