This may seem like a radical statement, but stick with me and I will very quickly show you the truth.
You would not put up a Civil War flag representing the South outside of your "church" building to attract people who are black to your "church", but you continue to use the words like "church" and "christian" which have a horrible history to the ethnic Jewish person.
Maybe it is because you don't know that history. Go to your favorite search engine and look up the term, "Pogrom". Here https://en.wikipedia.org/wiki/Pogrom#List_of_events_named_pogroms about 1/2way down the page is a table you can look at. "Christians" or people identifying as "Christians" were at the heart of most of the persecution against Jews.
Did you know that just before Columbus was "sailing the ocean blue" Spain was expelling all Jews from Spain at the request of the Christian leader?
The Crusades? Oh boy! Read all about it here, https://jewishvirtuallibrary.org/christian-crusades-timeline-1095-1258
More bad stuff to read about (the Inquisition) https://jewishvirtuallibrary.org/dominicans
So, hopefully now the statement at the beginning does not seem so radical.
I hope we will all consider taking down the "Dixie" flag and putting up words like "Messiah's Community" and "followers of the God of Israel" "grafted in branches" and I am sure there will be others if we take a creative approach to this.
As the times of the end draw near and one of our assignments is reflecting the heart of the God of Israel for the ethnic children of Abraham, Isaac and Jacob I would hope we would be willing to change.