Galatians 6:15 For neither is circumcision anything nor uncircumcision, but a new creation is what matters.
According to the context of this verse, circumcision refers to religious ordinances, and uncircumcision refers to being without religious ordinances. Neither of these mean anything. What matters is the new creation. The new creation is Christ with the church. Circumcision is an ordinance of law; the new creation is the masterpiece of life with the divine nature. We should be those who live in the reality of the new creation apart from any religious ordinances.
We should only care for the new creation, which is Christ with the church and the church with Christ.