I rise in defense of a certain type of fundamentalism–that of believing that there are some things that are absolutely true and others that are absolutely false. And one must trust some kind of authority or simply make it up as one goes along, which has more pitfalls than trusting that our ancestors had just as many brains as we do and that revealed truth is truth.
Having said that, one must know which authority to trust, and therein lies the problem, I think. For the fundamentalist it usually is some kind of written document they can point to and say, “See, it says so right here!” What the fundamentalist doen’t seem to grasp is that authority lies in persons not in documents, no matter how sacred or factual or seemingly undeniable.
This is why Christ founded a living Magisterium instead of simply having Matthew or one of the other Apostles write down everything he said to pass it along to succeeding generations, saying, “Look at this writing for everything you need to know.” Jesus was wise and saw that people will twist written documents to fit what they want to believe/want to do. Using written documents as ends in themselves is what keeps fundamentalists of every stripe so sure, and why it’s so hard to shift them.