Grief will make people believe some pretty wild things.Ok, I'm going to dispense with the spoiler tags since it's already been out for a couple of months.
What was his reasoning for why his wife was locked up in the mountain? Locked up by the people/town she had been protecting? If they wanted her gone, why wouldn't they just kill her? The whole thing just didn't make sense.
It just made him look really stupid that he couldn't figure out he was being tricked. This dude that has been around for a thousand years.