This guy was locked up because he made severe threats that were taken seriously. Maybe you didn't care much about bullies saying mean things to you, but even then you absolutely would've been anguished if those same people had threatened you with death or grievous bodily harm, repeatedly and seemingly with full seriousness. There's no excuse here.
I'm more sympathetic with the perspective that they thought the guy was a likely danger to others. Reading the article though I think it's fairly obvious he wasn't being serious and he wasn't a threat, but obviously I haven't seen all the evidence. If he had a collection of weapons in his bedroom or something, then sure, the guy probably needs to be locked in a cage, but it seems to me far more likely that these were very stupid things to say from someone who didn't really understand the weight of what he was saying.
And even professional comedians make death threats as "jokes" sometimes. The nuance involved in determining whether a death threat is a joke or crime is something I've never really understood.
> The nuance involved in determining whether a death threat is a joke or crime is something I've never really understood.
Well, would you be scared if a known comedian pretended to threaten you as part of an act? If not, that means you actually understand the nuances involved.