"fundamentalist" is used as a slur by some people (c.f. https://www.urbandictionary.com/define.php?term=Fundamentali...). The slur assumes things that don't exist in the word itself, so it's not obvious the word incorporates them.

I think the difference between the slurred fundamentalist (connoting a terrorist-like figure) and a tech fundamentalist is objectively clear.

Fundamentalism implies a religion-like devotion to your principles, it's definitely pejorative used outside of this context. FLOSS is not a religion.

From https://en.wiktionary.org/wiki/fundamentalism :

> The tendency to reduce a religion to its most fundamental tenets, based on strict interpretation of core texts.

Using such a strong word to define your adversary's position is a way to discredit them.

Perhaps "purist" is a better word here?

I think the original usage was fine, it just doesn't mean what some are trying to add on.

"principled"? I really try to avoid closed source proprietary software as much as possible both for ideological reasons but also because it's a pain in the ass if you like to hack your OS, you need to step around it all the time.

I can understand thinking it's a "fundamentalist" mindset if you're used to Windows or Mac and software being proprietary by default but if you're a un*x poweruser who doesn't hesitate to hack the source code of the software to customize it it's a very pragmatical approach I think.

> If you consider "fundamentalist" a rude adjective

How about no adjective?