...WHO CARES?
Not to be crass, but the whole discussion is ridiculous.
1) People are not required to have reasonable, consistent, or logical religious beliefs.
2) Nobody has any right to dictate who "gets" to be part of what religion or belief. If a person calls themselves a Christian, they are. Others are free to disagree with that assessment, but not to intefere with that person's right to identify with whatever religion - or none - that they choose.
Religion is a deeply personal and individual choice. The idea that one would have to justify their choice of religion to some kind of outside body or community is abhorrent.
I guess it's secularism's revenge - secularism is the only way that these differing religous views can coexist in one society. If religionists weren't so busy attacking the idea of a secular society, they wouldn't have opened themselves to having their religious beliefs dictated to them.