Let's call a spade a spade. It is grievous bodily harm, GBH. There is no justification for female 'circumcision' - though I would suggest that to call it that is to call a spade a salt spoon. I do not care how long anyone has been perpetrating such disgusting practice. They can stop right now or anyone with a moral compass should line up to counter this outrage.
There are certain social and cultural constructs which are the domain of that culture but the mutilation of children requires the full treatment it deserves from all human kind.