Edmund And Susan In Particular - Tumblr Posts
In Narnia's metaphor, Edmund isn't Judas Iscariot. He's us.
Edmund's betrayal isn't eating the Turkish Delight or even liking the Witch. That, and the effects of the Turkish Delight that follow, are his temptation.
His actual betrayal comes when he's seen evidence of the Witch's evil (at Tumnus's house) and heard all about the Witch's tyranny and the goodness of Aslan (from the Beavers) and he still chooses to go over to the Witch alone.
Of course the deck is stacked against Edmund! Of course he's being deceived and manipulated! Of course he's just a child! That's how sin works!!! Haven't you read Screwtape???
Edmund's sin is easy for us to excuse, but it is still inexcusable. That's the whole point. It is petty and small and childish and still wrong. Just like so much of our sin.