John, they don't come much more fundamentalist than the Amish. Want to try arguing their side?

"I betcha dollars to donuts I can tell you what most, if not all, of those interdenominational/interchurch/innerchurch disagreements are, and I betcha those same donuts I could argue either side and, though I'm pretty rusty on doing so, I betcha the donut holes that I could even give you the main prooftexts that either side would use in their side of the debate."