In my game of Stellaris I have a Pacifist government ethos and it has become a problem because somehow a tiny civilization took over a bottleneck system on my border and it is preventing me from expanding or interacting with other civs. (The only other outlet I have is blocked by a very powerful neighbor.)
The tiny civilization just has one planet and is Belligerent and Pathetic, so there is apparently no way to either ally with it or induce it to attack me. Since I am Pacifist, I can't attack it. It closed its borders to me, so I can't transit the system.
I tried to alter my ethos by embracing a Xenophile faction, but all that did was make me Fanatic Xenophile - Pacifist. From what I understand of how factions work, if I promote a different faction, then it will just me non-fanatic, so I will go to Xenophile - Pacifist - [Whatever the new faction is], and stay Pacifist. Also, it will take 10 years before I can even do this. So 10 years later and I will still be Pacifist and blocked. (There are no militarist factions, so I can't reverse the Pacifism that way).
How can I get out of this trap?