However, I would say that male circumcision is not morally reprehensible as FGM, because it does not destroy male pleasuring or procreative function. Circumcised males still freely enjoy sexual pleasure --- arousal, erection, orgasm --- and face no heightened risks to sexual/reproductive success.
On the contrary, I'm told there also exists a (perhaps slight) health/hygiene advantage, i.e. reduced transmission of infections. That's why it's still widely done in a totally secular setting.
That's why I think suggesting a direct moral equation between male circumcision with FGM is misdirected.
So when a similar defense is offered here (and that is the defense that any competent attorney will mount) on what basis will it be argued that this religious practice is not deserving of equal protection? Both are amputating sexual body parts without the consent of those on the receiving end of the practice.
The law is designed to protect people and practices you disagree with, because that's the only protection you have for your own practices that others may equally disagree with.
This is a wedge issue, to be sure. But there is opportunity to use this to widen the debate to other areas of liberty that are under equal assault.