How could anyone be this mean

humans are a disgusting species. ruin everything they come in contact with.



Not true. Man has the capacity for great evil, as well as great good.
We are imperfect. That does not mean that we ruin everything.
You choose to see good or evil in the world.

ASSUME?
How do you not know that a 4 year old child may have thought to give the kitty a necklace, or something else innocent like that? Perhaps the cat just got caught in zipties, like seagulls in six-pack plastics?
One could just as easily look at that and see that people have given of their hearts, and their most precious commodity, time, to care for a mere animal that they could have more easily just put down. I see good, I see redemption of man.