Yah but that is a bit of an extreme situation, you can't blame an intelligent sentient being that needs stimulation and freedom from turning murderous after it

Yah but that is a bit of an extreme situation, you can't blame an intelligent sentient being that needs stimulation and freedom from turning murderous after it was abducted from its family in the wild and caged up in a tiny pool for an excrutiatingly decades long life. The violent part is putting orcas into that situation in the first place, they are orders of magnitude too smart and curious for that. The murder that followed can't really be said to be an example of a species being prone to attacking a human in general, it is a very specific set of circumstances.