I suspect you misunderstand the meaning of the word fundamentalism; it's not just about absolutism, but also the authoritarian aspect, i.e. this issue is "back and white" and "i'm going to force you to to adhere to this black and white framework" (for some mechanism of "force"). My point is that it is the combination of "lack and white" and "forced compliance" that is the issue.

So your point "considered a "fundamentalist value" by someone else who doesn't share it" either a) directly contradicts the "No, the issue is wider", or b) you didn't understand what I was saying.