I like his character. I thought he had a really great background in the Kilo-Five arc- it gave him a purpose and a reason to be who he is and why. Either he'll be redeemed or hell succumb to his own fanatical ideology.
I dunno if his ideology is that fanatical, though. He starts from the position that humans are a threat, which is proven time and time again. They were the ones trying to destabilize his people. They were the ones who were attempting to cause widespread famine and death. He might have thrown his lot in with a bunch of religious zealots, but only to fight a war against a race that would mostly be happy to exterminate them as surely as the Covenant nearly did.