“Animals always have a good reason for what they do.”
Could this be because for the most part they lack emotions? They do what is instinctive, or natural?
A human motto is “If it feels good, doing”. We are feelings and emotions based. If it feels right to abort a baby, do it! If it feels right to be a homosexual, do it! And dam anyone that hurts our feelings or tries to correct our behavior.
Fortunately about half of us have a moral compass and enough intellect to keep our emotions in check.
“Could this be because for the most part they lack emotions?”
I think animals do have emotions, but they don’t make decisions based on them. What we humans would call horrible in the animal world, say dolphins “raping” other dolphins or male hippos killing the young of the female hippos so as they can mate with the females, is done for the purpose of the survival of the species. Humans harm other humans due to selfish reasons like pleasure, revenge, convenience, etc. We are totally nonsensical and evil creatures. Animals often mourn when their babies are killed. Humans go out and kill our babies.