I don't know enough about it to be able to call it abuse...but It does seem that the original motive behind it was to commodify women's sexuality (virgin=value) and to assure fidelity by removal of all pleasure from sex. It's interesting that in the countries where this is practiced, females are seen as the lustful ones who must be controlled. In Western countries it is males who are seen as the ones who are unable to control their sexual impulses.
I think that parent's who inflict this custom on their daughters are doing it for the same reasons that parent's in America circ their sons. Sheer ignorance. It's a leap for most people to question the validity of a cultural norm.
The question of whether or not we should accept other people's cultural practices isn't clear. Do I accept it as a fact of life, yes. Do I accept that it is based on a valid principle, no. If I do not accept it am I compelled to eradicate it? Isn't it beyond our scope of influence? Were I ever faced with the prospect of participating in such a procedure as a nurse then I would refuse and certainly would have something to say about it. But I doubt many of us will have the opportunity to protest in that manner.
It should be eradicated, so should male circ, child abuse and neglect, perinatal substance abuse, poverty and illiteracy, I could go on. Hmm, I guess all I'm saying is sure, we should eradicate FGM- those words are sincere but they mean absolutely zilch to the girls who will continue to suffer because of all the worlds problems, that isn't at the top of very many people's lists.