Person so desperate to be able to say things like "There can be no compromise!" and think things like "I am right and everyone else is wrong!" that they give up all critical thinking, accept literally the parts of a holy book that support their prejudices and take an unquestioning stance on one interpretation of a religion. They won't, of course, admit that it's only an interpretation; it's the ONE AND ONLY TRUTH. They often like to write words like TRUTH in BLOCK CAPITALS. See also Landover Baptist
I love the way fundamentalists claim the Bible is inerrant until you show them a bit they don't like, then start talking like liberals about "context" and "interpretation".