Though I think Carlin would have abhorred Knight's politics, at least he was funny.
The free speech warrior comedians of today are so dumb. The Comedians in Cars double episode with Ricky Gervais from this latest season was so painful. Just 40 minutes of Gervais saying roughly "just because you're offended doesn't mean you're right" instead of making jokes. I'd rather laugh from a callous, lewd joke than be preached to about free speech. If the prison rape jokes are funny (which...there aren't a ton of people able to pull that off now) ok. I think comedians should be able to push the envelope and make us uncomfortable a little. But the jokes still have to be funny. Knight's arrested development seems to have led him to think the kind of stuff most of us stopped laughing at in middle school (your mom, diarrhea, racist/homophobic jokes) is still the pinnacle precisely because it makes the libs uncomfortable rather than because it's inherently funny.