The ignorance of being religious, or ignorance in a religious kind of way.
"Give me a book, tell me it's old, and I'll believe every word in it."
Someone who only has knowledge of their own religion (usually a form of Christianity) rather than the major ones: Islam, Jewism, Hinduism, Confucianism, Buddhism. Also: someone who has their eyes blinded to truth by religious ignorance (ie: dinosaurs could not have existed - they are not in the Bible)
Religious ignorance usually is concentrated in churches - how ironic.
1. Atheism
2. Religious fundamentalism (i.e. forgetting the fundamentals of religion)
dumbasses who think that the only important religion is their own and those who think things only exist if they are in a book that i located in most motels