How is Stewart undermining his beliefs through his behavior? Are you saying that in order to criticize Crossfire, one must first do the same thing they do? And no one else is permitted to tell them they're doing a shit job?

Oh, no. Not at all. But calling someone a dick? Come on. Being a child does actually hurt a cause. Something far too many people miss. It's just as important to be an adult as it is to be right. Jon took a good amount of intelligence and washed it in 12 year old behavior. There are far better ways to go about it.

I don't think that follows. Can't you criticize a doctor for doing a poor job even if you're not yourself a doctor?

If you understand the context, sure. But again, how you do it is very important.