If Jon Stewart acts like a media critic and promotes integrity in journalism, his motivation is an implementation detail.
Asking if it is all just an act is an easy way not to meet the argument. This is why the "real" media call him a comedian or entertainer. His criticism is not crucial to them, it's all peripheral issues.
If on the other hand the goal is to put him on a pedestal or judge him, his mental states might be relevant.
If Jon Stewart acts like a media critic and promotes integrity in journalism, his motivation is an implementation detail.
Asking if it is all just an act is an easy way not to meet the argument. This is why the "real" media call him a comedian or entertainer. His criticism is not crucial to them, it's all peripheral issues.
If on the other hand the goal is to put him on a pedestal or judge him, his mental states might be relevant.