Bluh, I forgot that it's essentially impossible to invite someone to your federation if you're pacifist and they aren't. (Specifically, if you don't allow wars of aggression, and they do).
Which would be fine - I just federated with some militarist egalitarians. I had to forcefully change their minds first, so they thought alike!
Except I was hoping to federate with two machine empires, immune to my ethical ways. Meh... they have a -30 to federating for some reason anyway, so screwit. They have association status and my southern front covered, that'll have to do. Basically I'm Rogue Servitoring in reverse - no one will harm my precious metal friends.
Speaking of, that federation to the north that accepted me... Two spiritualists, one fanatical (and then both fanatical). It sure was nice of them to invite my materialist empire, and then to help enforce my ideology on our neighbor. I felt more than a little bad when I immediately left the federation and formed my own, with beer and robo-hookers.
Except it's FINE. I'm still a pacifist xenophile materialist, they have nothing to fear. Yes, I'm going to change their ideologies by force, but ONLY because that's the only path to peace. Otherwise it's a matter of when, not if, they try to destroy my robo-friends (not to mention me, having just unlocked Flesh Is Weak). I'm not even going to bomb their worlds. Considering that none of us are even egalitarian (anymore), I'm basically the good guy here. Yeah...
I don't like betraying people ):