Church today started at Pentacost ?, page-4

"But Paul declared the Church was that organism in which Jew and Gentile are equal.
But Paul declared the Church was that organism in which Judeans and The Nations are equal."
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My knowledge re the difference between Judeans/Jews & Gentile/The Nations is limited compared to yours.
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Does Gal 3:28 now make the difference irrelevant regarding how justification operates today ?
28There is neither Jew nor Greek, there is neither bond nor free, there is neither male nor female: for ye are all one in Christ Jesus.