The bible speaks against bodily mutilation, so I doubt this is something to be concerned about.
Leviticus 19:28 Ye shall not make any cuttings in your flesh for the dead, nor print any marks upon you: I am the LORD.
If you're referring to circumcision, remember that this was a sign of God's covenant, and also that all Christians undergo circumcision of the heart. This shouldn't be referred to as mutilation - would God command something evil for His people, or damage our hearts when He converts us?
I believe the Old Testament prophecies which were fulfilled in Christ spell out that true Judaism is over. If Judaism were true, how did the prophets get it so wrong? The Jews were rejoicing during Jesus' triumphal entry, because they correctly saw the event as the fulfillment of Old Testament prophecy. Many changed their minds only when He didn't violently overthrown their Roman oppressors as they had expected.