Sounds like Dawkins, right?
Religions: Featured Religions and Beliefs
The very first religion listed is....
"Atheism
Atheists are people who believe that god or gods are man-made constructs."
Possibly, although one could posit that Dawkins is bereft of any principles.
Furthermore, In the context of a discussion of a religious topic, it might be presumed that you intended the original meaning of the word; i.e. One who accedes to certain basic statements regarding the Christian faith. That is to say, certain “fundamentals.” Your definition appears to be informed by the constant media propaganda which would conflate “fundamentalism” variously with “snake handlers,” self righteousness, pharaseeism, and Jihadis. When one uses this mal-definition; it soon becomes a portmanteau word which can be used to tar anyone to whom the writer disagrees.
Further furthermore, “fundamentalist” defined thus, could legitimately be used to categorize many of the more prominent pro-Catholic posters, here on FR.
Do they not have “religious...point of view”?
Do they not “return to fundamental principles?” (Specifically, the distinctive doctrines of the Roman Catholic Church.)
Do they not “... adhere rigid(ly) to those principles, and often by intolerance of other views?”
I am not saying this in a pejorative sense, merely demonstrating that your definition is perhaps too broad.
DG