For just one thing, when you have a broken education system and omnipresent media franchises, you have a significant percentage of the population who know more about the Star Wars backstory structure and theories of diet than about history, civics or conventional morality.
I am not defending any of this fuckwits, but I don't know that it's much different than any organized religion. All of them are stories that get retold over and over until people accept them on faith. I can envision a world where our stories (movies, books) where history is lost of their creation, become facts. "Of course there was Jedi, we've just forgotten…"
Now, they're all fuckwits, but it's not outside the realm of thought.
A far more likely possibility is that their ideology is actually centered around "Sith who happen to originate from Vega (a.k.a. α Lyrae)", not "Sith who abstain from animal products".
(A residual possibility is "Sith from Las Vegas, Nevada".)
I don't think so. The people specifically are vegan, and their leader believes that future AI overlords will punish people retroactively for their moral failings. This is reported in some of the other posts on this page.
It's wild, but a view that is is fairly widely discussed in the rationality community, but only taken seriously by Fringe groups.[1]
Apparently, being a Sith meant to Ziz that you should do whatever is in your power and desire to do, without other constraints. If you're "fundamentally good" (a thing she believes in), then what you end up doing will be a kind of maximization of good.
Of course, this is trite pulp nonsense, high-school nerd level philosophy at best.
For just one thing, when you have a broken education system and omnipresent media franchises, you have a significant percentage of the population who know more about the Star Wars backstory structure and theories of diet than about history, civics or conventional morality.