This is, of course, a rhetorical question. Even though he is always wrong, he gets on TV because he and TV stations know that fear and war draws viewers and he has made a niche for himself as the go to person when the networks want someone to scare the bejeesus out of everyone. He is a like a clockwork toy that you can wind up and get the same result all the time
The Daily Show is worried that he is going over the edge.
(This clip aired on September 15, 2014. To get suggestions on how to view clips of The Daily Show and The Colbert Report outside the US, please see this earlier post. If the videos autoplay, please see here for a diagnosis and possible solutions.)