To try to explain away the "WHY" we always put ourselves and those we like in the best possible light and make the "WHY" noble and just and good. Whereas when we explain the "WHY" of those whom we dislike we are not so kind or fair. So how can we ever know the "WHY" of anything when we are predisposed to always stack the deck? Embrace partisanship. See the world as "them" and "us" and distrust/dislike/despise "them"? Hopeless.