Then why do so many people on your side of the aisle turn to these comedy guys for their news? Opinion shows are opinion shows. Hannity is no different from Jon Stewart (or Maddow/Chris Matthews, etc.) other than the lack of attempts to crack jokes. It's all OPINION programming. The only people who can't seem to tell the difference are folks like you.
First of all, it's not "my side" of the aisle, but anyone who calls out conservative media for being dishonest is automatically labeled as being "librul!" I expected it, believe me. If the right is anything, it's predictable.
Secondly, I've talked to enough newstalk listeners to know that they think of Rush, Hannity, Levin, etc as JOURNALISTS, not opinion guys. And if you think "well, that's the fault of the listener for misunderstanding their role", I urge you to listen to Hannity's words outside of his talking points---because on more than one occasion I have heard him REFER TO HIMSELF AS A JOURNALIST--- and I hardly even listen, but I've heard it several times.
Colbert, Stewart, et al are clearly known as COMEDY guys. Again the hint: "COMEDY CENTRAL". Limbaugh, Hannity, Levin, etc, air on stations that proudly proclaim themselves as "NEWStalk" this or that. Hannity is also on Fox NEWS. See a difference yet?
As far as Maddow and Matthews? Yes they're left-leaning, but nobody's even going to them for news---look at their ratings.
The irony of you debating "bias" here is comedy gold.