Us Christians have remained silent on circumcision to a large extent because being opposed to it somehow might seem to indict God.
Really? No, we've been silent because no one ever informed us it was a problem. I have yet to emerge from a church service, and be swarmed by reporters asking me to condemn circumcision. Does this happen where you live? I've heard of religious conventions and synods debating homosexuality and the role of women in church, but I haven't heard of circumcision being up for debate.
So, yeah, we've been silent because no one's asking us to speak about it. Besides, it was my impression that a lot of Christians practice it. I've no idea if that's true.
And, yeah, indicting God is something religious people would like to avoid. So pardon me if I'm not going to accuse God of ordering His chosen people to mutilate their boys.
Oh, and can you imagine how quickly the Establishment would close ranks to protect Muslims and Jews, if the mean, old Christians wanted to take away their circumcision?
That’s a poor excuse as even the Bible dispensed with the practice over 2000 years ago.
Over 2000 years ago puts us in Old Testament territory, but I assume you're talking about the New Testament. The NT never declares circumcision to be wrong, except from the perspective of Christians placing themselves under the Mosaic Law, rather than trusting Christ alone for salvation.
It’s a Jewish religious practice that served its purposes of health and separation from other people’s in pre-modern times.
Much like the Second Amendment, which served its purpose before we had the National Guard.