According to New York Magazine:
Conservatives like Stewart because he’s providing them a platform to reach an audience that usually tunes them out. And they often find that Stewart takes them more seriously than right-wing political hosts, who are often just using them to validate their broad positions, do. Stewart will poke fun, but he offers a good-faith debate on powder kegs — torture, abortion, nuclear weapons, health care — that explode on other networks.
As I’ve said before, Stewart is — like anyone who does good political satire — extremely smart and very well-informed.
Left, right, or middle, what’s not to love about that?