I'm genuinely surprised by this suggestion. I used to be an avid viewer of the Daily Show because I did find it funny and a better way to keep vaguely abreast of the news than watching actual news but I've largely stopped watching now primarily because of Jon Stewart's inability to be rational about most of the topics he discusses. I actually think Colbert has a much better grasp of science and seems a clearer thinker behind the persona.
Colbert has some very nasty things to say against cryonics, and to people who don't celebrate Christmas.
Jon presents a much better picture of his actual stances when he's not on the Daily Show. His latest appearance on the O'Reilly Factor particularly impressed me.
When he's on his own show, it's much more about being funny and exposing hypocrisy. I thought this community liked debunkers; I guess, with the topics being primarily political in nature and with the short time format making it prohibitive of expressing complex thoughts, it's easy to dismiss.
Light reading about 'Rationalist Heroes'.
I am not sure how useful people find having personal heroes. I would argue that they are definitely useful for children. Perhaps I haven't really grown up enough yet (growing up without a father possibly contributed), but I like to have some people in my head I label as "I wonder what would X think about this". Many times they've set me straight through their ideas. Other times I've had to reprimand them, though unfortunately they never get the memo.
One living example is Charlie Munger.
He was an early practical adopter of the cognitive biases framework, and moreover he clearly put it into context of "something to protect":
"not understanding human misjudgment was reducing my ability to help everything I loved"
(The quote is from his talk on "Misjudgment" which is worth reading on its own http://vinvesting.com/docs/munger/human_misjudgement.html)
One interesting point is that Charlie is seemingly a Christian. I have a deep suspicion that he believes that religion is valuable, for the time, as a payload delivering mechanism.
“Economic systems work better when there’s an extreme reliability ethos. And the traditional way to get a reliability ethos, at least in past generations in America, was through religion. The religions instilled guilt. … And this guilt, derived from religion, has been a huge driver of a reliability ethos, which has been very helpful to economic outcomes for man.”
Also, judge for yourself from his recommended reading list - looks like something out of an Atheist's Bookshelf.