It's ultimately a matter of Walt's own action before and if that happens. We can encourage him along and show him where the truth is, but in the end nothing we do will make him acknowledge or realize that truth. And for the time being, it appears that his interest is in irrationally attempting to pull the minds of everyone around him away from that same truth. He does not seem to understand though that he cannot move the truth though - only decide whether or not he will recognize it and embrace it, or shun it in favor of a self-created fantasy. In the words of Louis Wigfall, "Mohammed may come to the mountain, but the mountain will never come to Mohammed."