Well, they have a different environment with a greater need for extremely close social groups, so sensitivity to emotion may, indeed, be greater than ours in some ways.

That said, we have a conscience aka moral compass, a mind capapble of abstract thought and comprehension of morality, as well as a free will to choose whether or not to consider someone else's happiness in our ideals, attitudes, and behaviors.

Look at all the wonderful structures we design and build, and then how awfully we treat out-groups. We are capable of so much better, but why don't people give a sh_t?

I know why, and I've explained it in my comment history.