Hmmm....And that has nothing to do with the body of Christ where there is neither JEW NOR GREEK.
Again ALL of those refer to the BODY OF CHRIST, which began with Paul himself.
If a Jew, before the body of Christ was established, was not physically circumcised... He would be CUT OFF from his people.
Gen 17:9-14 (AKJV/PCE)(17:9) ¶ And God said unto Abraham, Thou shalt keep my covenant therefore, thou, and thy seed after thee in their generations. (17:10) This [is] my covenant, which ye shall keep, between me and you and thy seed after thee; Every man child among you shall be circumcised. (17:11) And ye shall circumcise the flesh of your foreskin; and it shall be a token of the covenant betwixt me and you. (17:12) And he that is eight days old shall be circumcised among you, every man child in your generations, he that is born in the house, or bought with money of any stranger, which [is] not of thy seed. (17:13) He that is born in thy house, and he that is bought with thy money, must needs be circumcised: and my covenant shall be in your flesh for an everlasting covenant. (17:14) And the uncircumcised man child whose flesh of his foreskin is not circumcised, that soul shall be cut off from his people; he hath broken my covenant.
Again, this refers to the BODY OF CHRIST, which began with Paul.
Romans 8: 15 For in Christ Jesus neither circumcision availeth any thing, nor uncircumcision, but a new creature.
Basically Paul is saying we must be born again. After the death of Jesus the Jews were no longer God's chosen instruments to show the world He is.
John 13: 34 O Jerusalem, Jerusalem, which killest the prophets, and stonest them that are sent unto thee; how often would I have gathered thy children together, as a hen doth gather her brood under her wings, and ye would not!
35 Behold, your house is left unto you desolate: and verily I say unto you, Ye shall not see me, until the time come when ye shall say, Blessed is he that cometh in the name of the Lord.
Isaiah 11: 9 They shall not hurt nor destroy in all my holy mountain: for the earth shall be full of the knowledge of the Lord, as the waters cover the sea.
10 ¶ And in that day there shall be a root of Jesse, which shall stand for an ensign of the people; to it shall the Gentiles seek: and his rest shall be glorious.
Isaiah prophecied this centuries before Jesus' birth.