Our official stance on the Xenos is "if you don't bother us, we won't bother you."
What cause do we have to fight the Xenos other than "Because Vanilla says so, lol."?
Rogue and Xeno NPCs can fight all they want to, but unless a player Xeno starts causing us trouble we're not going to waste resources on a pointless conflict.
Truth is, Xenos don't pose much of a threat to us any more. Maybe they do to you, but that's your problem.
The Xeno Alliance faction is hardly active enough for us to hunt down and bully. I'd rather do clever roleplay with them than beat them into submission.