Let me explain how (in my experience) different Zoners view the world:
Phoenix: Keep out of politics if it does harm them, they would deny on the start. They are on the very edge of civilization for a reason.
OSI: business people who most likely do not want other Zoners to screw over their lucrative deals... also as recent events showed, all Zoners would feel wrath of Rheinland and some other factions perhaps.
TAZ: Religious nuts (no offense). They will do anything that their (rather chaotic) religion will dictate them. They are also prepared for consequences of their actions unlike others who might suffer through unity.