I am used to hearing some version of this from conservative Christians who happen upon my blog or visit the website or community of Open Circle Church. (You can read a recent backhand swipe at Open Circle of this nature here from a conservative member of my denomination.) If you don't believe in a supernatural God or the virgin birth of Jesus or his bodily resurrection, you can't be a Christian.
But recently I have had the interesting experience of having atheists tell me that I am not a Christian because I don't believe in these things. On two different blogs (here and here) where I have been involved in discussions I (and others) have been told that I am not a Christian. I am not a religious person.
How ironic to hear this charge coming from this quarter. This is coming from people who are completely at home in the world explained to us by the scientific method, a world where new knowledge, new information, new thinking is continually brought to bear on what we know to be true at this moment, with a result that the truth itself is continually evolving. In every field of knowledge known to humanity, this is the accepted and expected way the world works.
Except, apparently, religion. They can't "have" a religious person doing the same thing. They can't imagine that there are Christians whose thinking about God, Jesus, and Christianity has evolved as new information is processed about our global village, or Biblical scholarship and Christian history, or the scientific worldview that we all share today.
"No, you can't do that." In religion, changing definitions is not allowed. Religious people are not allowed to think, and change their minds, and explain their symbols and their view of reality in new ways. You can almost feel the heads exploding as they come face to face with a piece of information that doesn't fit their stereotype of a religious person.