Hate to butt in on this, but speaking from experience? Pretty sure this sort of thing is exactly what hindered relations between those natives from Crystallis and the people summoned there. And they were just trying to help us help themselves. Not to mention they refused to even listen to one another half the time.

So from someone who's been on both sides of this: These guys haven't really given much of a reason to doubt them beyond not knowing the answers we seek. When they do? Be my guest to say I'm wrong. Until then? Do what you want, but please try and keep an open mind.