In Re: “Just as we are not bound by going through a High Priest by offering a sacrifice, we too do not need to follow the Jewish Law. We can reach God through Christ, on any day at anytime we so desire.”
Irrelevant as to what day is the Sabbath.
It was important to the Jerusalem Christians. James forced Paul to shave his head and offer sacrifices to prove he still followed Jewish customs.
Why were Jewish Christians still doing that?