You're new here. Welcome.
I think as you venture around this particular forum you'll notice that there is a collective that are staunchly opposed to any reference to anything Hebrew, Jewish, as pertains to their particular faith.
"That's for the Jews only!" "Gentiles were never ...."
The error there is that Jesus was Jewish. Jesus was the Messiah prophesied in the Jewish bible. And Gentile is simply a Hebrew word for nations.
Therefore, If we're to be talking about Jesus and exclusivity, then when Jesus was all about Judaism, no Gentile could possibly be part of the new covenant. Because the old covenant is the foundation of the new.
It is always concerning to find a Christian that also claims the ten commandments no longer apply. Scary thought if you know those ten. The Book of Hebrews chapter 8 puts things aright there however.
See how that works if we think Gentiles are it now, not anything Jewish?
Interesting take on the last supper. I've never thought of it that way. You know what is interesting? In that passage in the book of Luke , the last supper, Jesus offers the bread and says to his Disciples, do this in remembrance of me. And people here defend that as the Communion of today. Some of those same people will argue repeatedly that the commandment of God wherein He tells them, remember the Sabbath day and keep it holy, doesn't apply today.
They honor the remembrance Jesus instructed as Communion, but they insist God instructing them to remember the Sabbath is null and void.
Doesn't quite add up does it?
Again, welcome. I'm glad you offered that about the last supper. It makes one think.