I am partially referring to dogmatism, but also to those atheists who have faith in things like bigfeet or the Loch Ness Monster. For them, the lack of evidence doesn't seem to hinder their beliefs and I call them religious. Or how about those who were convinced the world was going to end in 2012? Some of them believed it like a Christian might believe in the second coming. Maybe they aren't really religious in the normal sense of the word, but their beliefs have elements of religiousity (is that a word?) in them.