^interesting! I have always looked at Shift as a false prophet, one who claims to know God (Aslan) and preaches falsehoods about Him. One I thing, however, that I disagree with, is that if people have heard nothing but lies about Jesus, etc...how can they be expected to turn to Him in love and faith? (The animals/creatures who looked on Real Aslan in so-called 'hatred' and were banished from Him.) They cannot be blamed for something that is not entirely their fault. (Now, in the case of one of the saddest scenes in the book, when the dwarves are so hurt by the fake Aslan that they refuse to see the goodness of the real Aslan...oh, it's just so sad. And it's not entirely their fault!!!) This is one reason I think so many turn from Christianity or never join it to begin with--all they hear are "fire and brimstone," "hell and damnation," "beware the wrath of God," God is an angry God" and all manner of similar rubbish....basically all they hear are untruths. They hear nothing of the Infinite Love and Mercy of our Saviour. Like the poor animals and other Narnians who began to not believe in or 'hate' Aslan, all because of the workings of a false prophet, a liar, one who would lead them away from Him.
I don't think the Narnians just "readily" or easily gave up their faith in Aslan. They felt wholly betrayed and used, abused, etc. Only such extreme cases such as that truly cause people to turn from their faith, and in such cases they cannot be held fully accountable. They were cruelly mislead and lied to. It is heartbreaking.