On the site's latest comic: in other words, Ruby Xyloxi is overestimating their quarry's intelligence. As one of the more obviously violence-focused Xyloxi in the games, this makes sense.
On the site's latest comic: maybe wizards in the Lord of the Rings sense, which were angels in human guise and had the power to match. (They weren't explicitly called angels, but Tolkien was as devout as he wasn't subtle)
On the site's latest comic: I'm not sure how they're going to react to the truth; the Mithri really doesn't give two ****s about the humans that have spent the past few months trying to kill it even after said attempts, but the thing it was actually going for is what allowed their town to exist at all. They'll have to find a new place to live, but otherwise there's no threat to anything not directly in its path until it runs out of Xyloxi spires.