First, why talk radio appeals to conservatives:
liberals and conservatives seemed to have different aesthetic tastes. Conservatives seemed to prefer stories with clear-cut endings. Liberals, on the other hand, had more tolerance for a story like public radio’s Serial, which ends with some uncertainty and ambiguity.
As Young noticed, this is a kind of ambiguity that liberals tend to find more satisfying and culturally familiar than conservatives do. In fact, a study out of Ohio State University found that a surprising number of conservatives who were shown Colbert clips were oblivious to the fact that he was joking. In contrast, conservative talk radio humor tends to rely less on irony than straightforward indignation and hyperbole.Conservatives often like to shoot straight and explain how things are. Which helps explain why liberals are drawn to comedy and satire:
the genre has always been aimed at taking down the powerful, from the Revolutionary War through Vietnam and 9/11. “Conservatism supports institutions and satire aims to knock these institutions down a peg,”Conservatives want to "conserve", often skeptical of change. This makes them more loyal to traditional institutions. These, by there nature of being the "establishment", are open to attacks to keep their power in check. The whole article is insightful and I highly recommend it.