Well you have an issue with your reading of Acts 15. Circumcision is shorthand for obedience to the law, that is the way Paul uses that term, 'circumcision'. See the example below from the letter to the Romans.
Romans 4:9
Is this blessing then on the
circumcised, or on the
uncircumcised also?
There you go, the pharisees were actually saying that the Gentiles needed to be under the law. That is what circumcision meant to the Jews in the first century, they called themselves
the circumcised. The council in Jerusalem was never talking about the physical act of circumcision.
Anyone who thinks for one moment that the great debate described in Acts 15, is merely about a snip downstairs. Should seriously give up reading the New Testament, your wasting your life trying to read and understand the text.
The answer the apostles gave was an emphatic statement, the Gentiles are not under the law.
The proof is simple, if the Gentiles were under the ten commandments. Then the apostles would have said, DO NOT COMMIT ADULTERY.
But they did not say that, they said, ABSTAIN FROM SEXUAL IMMORALITY.