I think it may have something to do with how she sounds.
Gov. Palin’s regionalism seems odd to me, even though I like just about everything she says.
Her hairdo is rather odd looking as well, but she sure is a lovely looking woman.
Resigning as governor of Alaska did not help. I think it would be very difficult to explain that decision to people who don’t know much about her.
Beyond that, I believe most of the criticism is based on jealousy and elitism.
Hell’s Bells, Abe Lincoln didn’t go to college either, but can you imagine America without Mr. Lincoln? God help us.
No, the left hates her because she proves the lie of their pro abortion/pro choice stand.
Those on the republican side are mainly cynically trying to keep her from ruining Jeb’s chances in 2016. (Rove, Kraphammer, barbara bush, Will, et al)
They are complicit with the left in advancing the smears, but for somewhat different reasons (although pro-choice republicans are afflicted the same way by her I’m sure).
Her inherent goodness and character shows them how debased and vile their lives are, and they hate her for it.