Secure: a positive view of self/a positive view of others
Avoidant: an overly inflated view of self/a negative view of others
Fearful: a negative view of self/a negative view of others
The real reason I would assume Hitchens made that statement is because of the ways that Evangelicals tend to manipulate and redact the beliefs of famous "non-believers." Charles Darwin, though not an atheist, did not "accept Jesus on his death bed." Christian propagandists claim that Anton LaVey, the founder of modern Satanism, also accepted Christ on his death bed (notice a trend here?).
Remember the story about the anonymous atheist professor who challenges God to keep a piece of chalk from breaking when he drops it from his hand? Then he converts when it rolls off his pant leg?
I've heard Stephen Hawking and Albert Einstein called "Christians," too. Sorry.
Wikipedia has a page, "Former Atheists and Agnostics" - http://en.wikipedia.org/wiki/List_of_former_atheists_and_agnostics. I thought it might offer more helpful information, but it lists people like Kirk Cameron among "converts." Hardly compelling.
My point being: I completely understand Hitchens wanting to clarify his unbending position. There may be a host of Christian bloggers ready and waiting to post all sorts of propaganda when he passes. Even www.snopes.com can't effectively counteract all the rumors that become unsubstantiated truth. Agree with him or disagree, Hitchens still deserves to be represented for the things he actually believed. Everyone does.