"You can't oppose ritual incision of the genitals without opposing"
Sure I can.
I oppose the ritual female genital mutilation that is happening because it is a horror being done to my fellow human beings, not because I oppose things that are called ritual genital mutilation. For example, it could become an optional tradition for a bride and groom to get matching pierced jewelry of the type many people walk into shops and get installed entirely voluntarily. That would be ritual genital mutilation and I have no problem with it as long as it is voluntary.