You are thinking from your perspective, from the perspective of the creation. Stop for a moment and think from the perspective of the creator. Does the creation's feelings as strong to you now. Animals kill each other, and it's the protocol that the creator has made when he/she created the creation. The creator also gave varying degree of sense, that makes some creations smart and senseful. Now, it's the intelligent creation's duty to keep peace, order and care for other less intelligent creations. If the creation doesn't follow that then the creation is no different than the other creations, and hence will be treated like the other creations by the creator. And god has some cruel catastrophic weapons to punish those creations. And then again the creations start thinking there is no god.