St Paul speaks of baptism as the new circumcision in Christ. Baptism spiritually marks a Christian in the New Covenant as circumcision physically marked a Jew in the Old Covenant.
I see what your trying to get at but no, it doesn't work as you think.
True circumcision, as Paul preaches in Romans 2:29, is that of the heart, and it is accomplished by the Spirit. In other words, a person today enters a covenant relationship with God not based on a physical act like baptism but on the Spirit’s work in the heart. Baptism has nothing to do with that.
In Israel every male was circumcised, whether he showed any devotion to God or not. Moses commanded the Israelites in Deuteronomy 10:16 to circumcise their hearts, and even promised that God would do the circumcising (Deuteronomy 30:6).