Yes the thing that most marks most so-called "fundamentalists" is their "majoring in the minors" as a friend of mine once put it. They take things that are NOT fundamentals (e.g. (for some "Christian fundamentalists") might be how one dresses, or how long one's hair is), and make it a touchstone of a person's devotion to their religion.

I applaud your attempt, John, to rescue the word "fundamentalist" from these people, but fear you will not be able to. The word has picked up a lot of cultural baggage since 1905 or whenever it was that it was coined.

Alex