The Democrats have gut-level-appeal rhetoric because they try to make everything class war, race war, good guys/bad guys. Conservatives generally realize things are really a whole Hell of a lot more complicated than that, but reality doesn't make for good ringing phrases and sound bites.
I don't count idiots like the far-Right fringe as Conservatives in that, any more than nihilists, anarchists, and other Left-wing fartbrains represent Democrats. Though, of course, there are some of them on DU who think they are Democrats, whether their own party really wants them or not.