Yeah, I differentiate between atheist, and anti-Christian. You can tell pretty quickly by talking to them that all their proofs for the non-existance of God (The philosophical equivalent of dividing by 0) stem from debunking Christianity. Quite othen Evangelical, and/or Catholic Christianity.
"The Catholic Bible is wrong, ∴ God does not exist." Okay, what about Buddha? There's no evidence of Jesus, but Buddha was a real person, who said and did some real things, and that doesn't prove he was the re-incarnation of Brahma, but at the same time, pointing at Rome points away from EVERY OTHER CULTURE, and their beliefs.
These same guys eventually fall back on calling me a "Knowitall." Okay, I don't know it all, that's the basis for my Agnosticism. Anyone who is so convinced of their conclusion, based on a complete, and utter lack of evidence, and narrows their thoughts to 1 town in 1 city in Italy has even less of a grasp on the scale of the Universe, and what it may or may not contain.
The Vatican is not the center of the universe. Arguing as if it is, even as an Atheist, is just plain fucked up.