Then why not yawn and let things go when a bear acts like a bear and kills someone? It is still prudent to save the life of the next victim when we have a known problem animal.
Are there any other fatalities associated with any of the other 50+ killer whales in captivity? If not, then I suggest it is prudent to put this one out of harm's way, one way or the other. It is the outlier, and the reasons why are a secondary concern.
Presumably because the bear has free reign to roam wherever he chooses, and as such poses continued risk to the public. The whale certainly cannot swim from home to home, terrorizing children at play.
The only person (people) or animal with any culpability here is the trainer and the management staff of Sea World. If the animal is so unpredictable, that it needs to be isolated, then so be it. But, that's not license to kill it out of pure convenience. Either return it to the wild, or continue to care for it, as is the park's assumed responsibility when it placed it (or it's parents) into captivity.
Please read my comments @50. They apply to you as well. I think it’s ironic that you choose the word Liberty as part of your tag. Think about it.
BINGO. This orca should have been culled after it killed the first human. Unlike tigers and bears, which have a long and established history if killing men in the wild as well as in captivity, orcas have a long and established history of refraining (for the vast majority of the time, despite infinite opportunities) from killing people in the wild and in captivity. This orca is an aberration, not the norm.