Agreed. But thinking things through does not equate to arguing at the extremes. Not every action begets an absolute. Killing four apes does not equate to killing EVERY ape, or, even more absurdly, every animal! And THAT is why I don't care, not because I celebrate the senseless slaughter of four apes, but because I think that that's where it will stop.
You need to stop overreacting to every situation that scares you by taking it to an extreme and then finding a "solution" for that extreme.