Given your defense of religious circumcision in other threads, I have to say I'm surprised to see you say this.
What I meant by that was that, just as with decisions that parents make from their personal or cultural philosophies, from their personal or cultural perceptions, or for whatever reasons encourage them to make the decisions, government or other elements of social control should not have free rein to come in and gainsay the decisions unless there is some measurable and immanent threat of serious harm to the child. And that means more than the usual issues everyone ends up with, good parenting or bad, given that even the best parents can sometimes be wrong or make mistakes. But that's the prerogative of parenting, unless we intend to take all children from their parents and raise them in state institutions, which should result in a whole different slew of errors and accidents, and a whole new crop of dysfunctions in such children when grown.
I said when I defended circumcision that my defense was purely that of the right of Jewish or Muslim parents to circumcise their own children, provided such circumcision is done in a safe way by someone qualified to do the circumcising. And that part and parcel of my feeling that it was no one's business but that of the parents, the child, and the culture of the Jews or Muslims, is that the medical community overwhelmingly says that properly done circumcision causes no harm, and if anything might provide some slight health benefits. Whereas those who claim it does harm have little compelling medical and ethical evidence to support the notion that it is either harmful at all, or so harmful that government should step in to prevent parents from exercising their rights as parents to have this procedure done to their sons.
And in any case, I presumed that the OP was mostly in reference to major medical issues, like withholding blood transfusions or refusing antibiotics, or suchlike; and was not meant to refer to minor ritual procedures that, if properly done, never come close to threatening the life and health of the child.