Female can be used as an adjective when applied to a specific noun (eg Doe a dear a female dear), but generally it is a contextual Noun.

As to what Greenheart is expressing it is a matter of incredulity to me also, that women, gay people, people with disabilities (and many of us have never objected to the term handicapped) and gentiles would ever want to be Christians considering who disparagingly the bible talks about them.
The Old Testament would have them all put to death or be oppressed, and the the New testament would have them burn in Hell forever or in the case of women, submit utterly to men and sit silently or else face hell fire too.