[adrianba]

I'm not sure it's that bad. It's still the law in the United States that you cannot claim a religious exemption to a (state) law of general applicability. If the law applies to everyone regardless of religion and was not intended to impact a particular religious practice, then you cannot challenge it you because you claim that it affects your right to exercise your religion. See City of Boerne v. Flores, which affirmed Employment Division v. Smith despite Congress's attempt to legislate it away.

[User23]

Would a state law banning infant male circumcision as genital mutilation without consent stand?

How about a state law against branding or tattooing infants or any other irreversible body modification?

Clearly these are both rhetorical questions with obvious answers. Whether or not those obvious answers are morally correct is another matter.

[adrianba]

I'm not sure what point you are making here. Presumably your obvious answer is "yes"? For example, there are indeed some states that outlaw tattooing minors (although many states do permit it with parental consent).