When a cute and innocent individual get brutally murdered, people get sad. When it’s some guy in sub-Saharan Africa, that you hear similar reports of every day, it’s just not evoking much of a response. Probably that is what is going on.
Also, there are fewer dolphins than there are humans. From that perspective, it is even sadder.
I don’t agree that humans are special in any way, btw.
There is this concept of ‘Us and them’, a in group and out group. In conflict it is often utilized to make your guys hate the other group and ‘dehumanize’ them so that you can prevent your guys directing sympathy towards the enemy. The other guys may have different language and culture and whatnot. Language is one of the best barriers for sympathy and is well recognized by the ones that use this to their advantage.
To a large extent, I think it is the same principles that prevent people from recognizing the suffering of individuals of other species.
We apply importance to the recognition of suffering so we can prevent it. I say we apply it to everyone.
Now, of course we can nit-pick and try to separate out who or what we apply sympathy to. You could designate some things as just automatons; such as ants, bacteria or even viruses. But I’m not gonna do that now.