I don't think Peggy is going after Palin because of jealousy. I think it has to do with a fear that Palin is another Bush. I think that fear is unfounded. As I noted in my post above, Palin is no Bush. Palin governed as a strict fiscal conservative. Bush did not. Palin's populism is based on the American tradition of self reliance and local autonomy. Bush's populism was grounded in what he called "compassionate conservatism" -- which translated into big government spending programs which were really only a more efficient variation of LBJ's Great Society. Palin doesn't promise goodies and programs. She simply promises to put government back on the side of the people by reining in spending and making sure taxes are low.
Peggy feels betrayed by W. and so she has a "never again" mentality, which has sadly made her blind to Palin's virtues.