Sorry. There's another reason I said it that has little to do with atheists, it's that 'theist' as a label is just not all that useful to many who would actually fall under that classification. There are so many theisms, e.g., monotheism, polytheism, henotheism, pantheism... it seems that everyone is a specific type of theist. 'Theist' doesn't do more to describe the person, so the only real use is in the collective sense. Yet atheist is in opposition to the concept of theism, and I hear atheists use the term 'theist' a lot. It just made it that little bit easier to write that post. I do apologize for the sweeping statement.