He was probably just being nice. I don't think anyone could have seen Jon Stewart becoming as influential as he has. Or maybe Carlin is just that wise.
Just want to say Jon Stewart once played a clip of himself on MTV in like '92 and he looked 20 years old. It was really weird seeing college Jon, it was like CGI
It's kinda sad that he's lost luster in the public eye over the last few years for essentially delivering the same humanist message in an ever-more succinct and provocative form. What a bunch of cowards we are.