The Brotherhood of Ash isn't really buying what Ifrit is selling. They're kind of at war with those who believe in the Fire God. Other than that, he seems like a fine take on the "tribal" miqo'te concept.
From what I've seen doing the beast tribe quests and whatnot, they dont seem to be completely against Ifrit, just opposing the way that the rest of the amalj'aa see him? To me it seemed like a division vaguely similar to catholics and protestants, but please do correct me if I'm wrong. :3