I don't know what the reason for the hatred of Palin is. She hasn't yet declared herself a candidate for President, but the left certainly seems to be as afraid of her as the Oceania apparatchiks were afraid of Emanuel Goldstein in 1984.
A humorous example of this occured on a recent edition of Hardball with Chris Matthews, who never passes up an opportunity to laugh at Palin's intellect but who should himself be much more humble in such matters. His guest, one Richard Wolffe, scoffs at Palin's claim to derive inspiration from C.S. Lewis. The relevant portion starts at the two minute mark:
All Wolffe knows about C.S. Lewis is that he's the "author of a series of kid's books"? He's never heard of Abolition of Man, On Miracles, The Problem of Pain, Mere Christianity, Pilgrim's Regress, The Great Divorce, Surprised by Joy, A Grief Observed, The Screwtape Letters, The Four Loves, the space trilogy, the Oxford debates, and so much more? And this uninformed man is chuckling at Sarah Palin for finding inspiration in Lewis? Does he not realize that millions of people have found inspiration in Lewis?
It gets worse as Matthews, who obviously doesn't understand how a guide works on a hunting trip, derides Palin for having people around her as she shoots a caribou (it wasn't a moose as Aaron Sorkin, who apparently can't tell the difference, mistakenly claims as he calls Palin a "witless bully").
These people would like everyone to think they're endowed with wisdom, erudition, and sophistication superior to that of the rest of us, but in their adolescent attempts to make Palin look foolish they instead make themselves look like a clique of unpopular middle school girls sneering at the attractive new girl of whom they're profoundly jealous.