The alleged discrepancy that is featured this week is an interesting one indeed.
The problem “finding” skeptic presents us with the following:
GE 17:7, 10-11 The covenant of circumcision is to be everlasting.
GA 6:15 It is of no consequence.
The reality is that physical circumcision pointed to a much greater spiritual reality. Moses stated that God would circumcise the hearts of the people (Deut 30:6). We are told that there is a circumcision made without hands (Col 2:11). This circumcision is that which is of the heart, in the spirit, and wrought and accepted by God (Rom 2:28,29)
Yes, physical circumcision is of no spiritual consequence. It pointed to spiritual circumcision; the working of God by which He removes our sins from us and gives us a heart to serve and worship Him.