And you might think that a party committed to tax cuts for the rich, a party that routinely castigates those who engage in “class warfare,” would shy away from attacking a Democrat for his wealth. But raw class envy played an important role in the attacks on Mr. Kerry, whom Rush Limbaugh described repeatedly as a “gigolo” with a “sugar daddy wife,” and G.O.P. supporters don’t seem to have experienced any cognitive dissonance.