Hmm. That's essentially the definitional difference between criticism and prejudice, isn't it? Seems a bit self-evident.

I apologise, my understanding of female genital mutilation is limited. I was under the impression that it was generally performed on children, and was intended to make sex more painful. That seems far removed from cosmetic modification (which is not to say that the promotion of labiaplasty is a good thing).

There's an interesting grey area: how informed do you have to be before it's okay to criticise? Also: how many roads must a man walk down? :P