Israel's mission is to compel the nations of the world to observe the Seven Noachide Laws. And those laws forbid complete Shabbat observance, as Jews practice it, to non-Jews.
Does scripture tell you this or does tradition tell you this?
So, since Scripture commands that some sacrifices be "heaved" and some others be "waved" (and even sometimes that "people" be "waved") but doesn't say a word about how this is done, where do you suppose those instructions are located?
What do you think the Benei Yisra'el studied for those forty years in the Midbar before Moses wrote down and distributed the tribal scrolls just before his death?
Protestantism was right to reject Catholicism's/Orthodoxy's traditions. The problem with those religions is that they replaced G-d's Traditions with their own man-made ones. In rejecting the very concept of an authentic Tradition from G-d Protestantism, like its heretical Jewish predecessor 'Qara'ut, completely jumped the track.
So this:
"Israel's mission is to compel the nations of the world to observe the Seven Noachide Laws. And those laws forbid complete Shabbat observance, as Jews practice it, to non-Jews."
is a view based on tradition. Thank you. I didn't think I had read anything in scripture to support this notion.