I'd take it as a sign of dismissal or a petty insult, as I don't consider myself a primitivist. My unfavorable views towards civilization, scientism, and "progress" stem more from an egoist perspective than anything else.
The word 'primmie' is a lot like the word 'globalist' or 'cuckservative' - it says a lot more about the person who says it than the person they say it to.
ziq wrote
It lets me know the person I'm talking to has shit politics so I can adjust my method of engagement appropriately (to mocking the shit out of them).