I looked up your Bible references (Gal 3:28, Col 3:11, 1 Cor...

I looked up your Bible references (Gal 3:28, Col 3:11, 1 Cor 12:13) which came up with the following...
There are strong parallels between Galatians 3:28 and Colossians 3:11 ("Here there is no Gentile or Jew, circumcised or uncircumcised, barbarian, Scythian, slave or free, but Christ is all, and is in all.") and 1 Corinthians 12:13 ("For we were all baptized by one Spirit so as to form one body—whether Jews or Gentiles, ...
so the answer to the question Which audience do we belong to?
seems to be that all "audiences" are treated as being the same so I don't understand why you distinguish between audiences.
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One of my grandsons was circumcised and the other was not. Could you please help me by explaining why being circumcised and not makes a difference between the two even when scripture doesn't support a difference?