Terrorism "conspiracy" charges can be pretty wide-ranging. It sounds like that incident alone would have incurred tens of thousands of dollars of costs for both law enforcement and the airline.
Which part of what he was doing should he not be doing? It was all external parties that caused the kerfuffle. He's obviously a successful broadcaster, and he's making money at it without himself breaking the law, so you can't tell him not to do that anymore. (That's a prior restraint, no?)
I agree that it's problematic and it's costing money, but if those trolls that called in the bomb threats cause his show to be closed, isn't that basically the end of free speech? The fraudulent reporting caller should be prosecuted, sure.
Anyone can call in a SWAT raid on anyone else. I myself haven't watched the show, so I don't know to what extent a conspiracy charge would stick, but ...
If I go somewhere and start a Live Vlog, and someone watching figures out where I am and manages to put the police onto my camera, "for the lulz," and that's the whole story, then why should my "broadcasting license" be revoked? Never mind no such license is required, just hypothetically.