Like I said, it's worldbuilding.
All my stories are set in one of three universes: general SF, Fantasy, and far-future SF. This is from the SF Universe.
It's basically one of the Bad Guys explaining their motivation in their own words. Proper motivation for the villains is a big thing for me; it ties into my whole philosophy of Evil. Namely that "Evil" depends greatly on where you happen to be standing.
As far as the bittarii are concerned, they're on a self-evident mission to improve the state of the Universe. It's only from everyone else's perspective that they're a genocidal menace bent on killing anything that moves and demolishing everything that doesn't.
"The Beasts know much that we do not." -Ancient Jedi proverb