Yeah, the Nadaam. I could see your typical XIV moron whining about that, but dude was just working within the rules of the society he was in.
Lizard dudes like to fight, they don't mind going to fight the Empire but want a valid reason. Near as I can tell it breaks down to:
The Mol: Gods said we're supposed to do this, so idk, whatever.
The Doth: Fuck around and find out
The yellow/green tribes whose names I can't recall: Well, you're in charge now, so that's cool.
Add to that the Empire comes storming in and tries to slaughter everyone, thus giving all the tribes a reason to be personally pissed off with them.
And this shit with Hien is hilarious. He literally tells you in a cutscene he was in the womb when Doma fell and has never known a free Doma. There's a reason why he fucked off.
He comes off as a real insightful, intelligent and forward-thinking type of character. The kind of person I think the devs want Alphinaud to be, but Hien has a bunch of humility and maturity that isn't present with Alphinaud. (Yes, I get that Alphi is the spoiled rich kid stereotype and Hien isn't so there's going to be characterization differences, but Hien's intelligence and insight comes off far more convincing than Alphi's self-fellations.)