I'm not sure why you think Xenos would turn on Zoners considering the majority of their inRP essential supplies come from them (refer to Milford Base infocard, among others) and sympathize with the whole Penn situation as well as agreements with the Zoners on Ames which took place before my time here. Without that cooperation Xenos would have to survive solely on what they could seize. Not to mention other than Hellfire, Zoner bases are the only other faction's bases in Liberty they can land on. Xenos may be poor, but they aren't stupid. I get what you are saying about foreign influence, but the Zoners were in Penn first before the LibGov made it a protectorate and that is how Xenos justify ongoing cooperation - mutual sympathy.
They would need a good reason to decide that Zoners are an enemy, but IMO I can't think of one. That's not to say you couldn't do it, but you would want to think of a good plot for it.
Might I suggest perhaps something like a starting with a Freelancer ID, moving more to a Pirate ID as you move onto less peaceful protests and gain a reputation?