I reject out of hand the notion that circumcision was abolished at the cross or anywhere else for that matter.
Circumcision was NEVER a requirement for gentiles - so not requiring of of them is NOT abolishing it.
Circumcision is STILL required for the Jews as part of the Abrahamic covenant. Not abolished at aall.
Here's a few scriptures showing Christ abolished the Old Covenant which Circumcision became a part of.
This verse shows that circumcision, not blood made one a Jew.
“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.” (Genesis 17:14)
This shows that the Ten Commandments (The Old Covenant) is obsolete having been replaced by the New Covenant. Circumcision was part of the Old Covenant imported from Abraham.
“Behold, the days come, saith the LORD, That I will make a new covenant With the house of Israel, and with the house of Judah: Not according to the covenant that I made with their fathers In the day that I took them by the hand To bring them out of the land of Egypt; Which my covenant they brake, Although I was an husband unto them, saith the LORD:” (Jeremiah 31:31–32)
Paul shows that the Law and ordinances were removed by Jesus on the cross.
“And you, being dead in your sins and the uncircumcision of your flesh, hath he quickened together with him, having forgiven you all trespasses; Blotting out the handwriting of ordinances that was against us, which was contrary to us, and took it out of the way, nailing it to his cross;” (Colossians 2:13–14)
Moses calls the Ten Commandments "ordinances".
“And thou shalt teach them ordinances and laws, and shalt shew them the way wherein they must walk, and the work that they must do.” Exodus 18:20 (KJV 1900)
Paul forbids circumcision in the traditional Jewish. (We are not talking about 21st century medical practices).
“Stand fast therefore in the liberty wherewith Christ hath made us free, and be not entangled again with the yoke of bondage. Behold, I Paul say unto you, that if ye be circumcised, Christ shall profit you nothing.” (Galatians 5:1–2)
“For I testify again to every man that is circumcised, that he is a debtor to do the whole law. Christ is become of no effect unto you, whosoever of you are justified by the law; ye are fallen from grace.” (Galatians 5:3–4)