you've totally misunderstood Jon Stewart on that program. So did Rachel on many points.
The echo chamber of people who hang out on cable has you both misreading things.
I do not particularly care for Jon's sophomoric brand of satire. I always found Carlin a bore too. But, I take Jon at his word that he is mainly an artist/entertainer/comedian, and not a newscaster.
I loved his rally and loved the fact that he did not try and make it into what 'others' wanted it to be. It was funny and fun. I know people who went. They enjoyed themselves.
I agree with Rachel that the GOP sometimes embraces the right wing fringe whereas the Dems do not embrace the left wing fringe. You'll never see Code Pink getting the backing from the DNC to run candidates, or worse sitting in Congressional seats. You'll never see the anti-war left making policy (even under Obama they have been used. LOL).
but the point is you are unhappy because you have misread Stewart. He has never pretended to be anything but what he is. That I respect him for. He hasn't changed much since he played in Boston ages ago. Nice guy. Self-centered little twerp. An Emerson College type.