Why do liberals fear Palin?

Seems like most liberals I know and those I view on MSNBC/CNN/Chris Matthews etc. have the same syndrome they had with W, PDS "Palin Dysfunctional Snydrome". There seems to be some thing about her the elites, GOP oldboys and cable snobs can't stand. Their comments attack her person, her family (even her challenged son). They use sexually derogative terms to describe her Tea Party affiliation. Is it they fear she will win once Barrack totally ruins the country?