I myself am circumcized and so are the 2 oldest boy yfs I hang around but the 2 younger ones that are 3 and 4 the mother gave me the say on that and they are uncut. As for in the bible what I can find is
Romans 2:28-29, “For he is not a Jew, which is one outwardly; neither is that circumcision, which is outward in the flesh: But he is a Jew, which is one inwardly; and circumcision is that of the heart, in the spirit, and not in the letter; whose praise is not of men, but of God.
Christians are suppose to give their heart to God and that circumcision of the penis really isnt necessary I do consider myself christian though am I perfect? absolutely not.
Hope this helps any though Im sure youve been told his verse many times lol