The Wikipedia definition seems to indicate it has origins as a racist term and I’ve never understood why unix users have adopted this terms instead of something benign like “themes” or “theming” which I remember being in use long before I ever heard “rice”. So what gives? Why use “rice” instead of “theme”?
The fact that g–p is a slur is not a new thing. It’s the equivalent of f----t or r----d for a large number of disabled people, and has been for years. The fact that you did not know this doesn’t make it any less true.
Do you honestly believe a name change would vault the project into obscurity? Seems like a quick press release would do it.