Did you take environmental ethics too?
Not really environmental. Just meta, first and second order, and applied ethics.
Any way I follow mostly utilitarianism. I don't have problems killing and eating animals as long as it is done in a human manner.
Actually, an utilitarian would argue that killing animals is wrong because they, like us, can suffer and feel pain. See Peter Singer's argument.
I do consider killing humans worse then killing animals because of our rationality.
I agree with that.
What about inside influence? You do realize humans develop greed and savagery when in competition with another creature, right?
Yes. However, our reason allows us to evaluate the morality of our action, so we can tell what's right and what's wrong. With our rationality, we can see that greed or savagery is wrong. Rationality is what makes us human or "personhood."
I wouldn't even really call those influences, just nature at it's finest. Would you then consider them animals or humans?
Depends if they are rational or not.
Also, morality is not determined by being human or not. Animals have been known to show remorse, fear, and show judgmental behavior. My dog used to sit in his cage when he knew he had done something he wasn't supposed to do, without my needing to scold him or anything. That shows morality.
That would be Hume's argument: that morality exists independently of us and reason. His argument is based on subjectivism.
Ergo, morality is subjective and nothing more than a set of influenced/pre-programmed set of mental guidelines. It has nothing to do with being an "animal" or human. As stated, if that were really the case, there are a few people in history I would call animals and not humans.
That's entirely up to you. For me, I do not believe morality is subjective. For example, in Simple Subjectivism, James Rachels criticizes that with subjectivism, there would be no moral disagreements, as each other is saying different subjects. When I say capital punishment is wrong, this subject is different from yours saying capital punishment is right. You can't say my moral judgment is false, and I can't say your moral judgment is false, mainly because we are just reporting our attitudes. My moral judgment is true only to
me. Thus, according to Simple Subjectivism, we are infallible.
However, we are fallible, and there are moral disagreements in this world. Therefore, I agree with Kant that morality is objective (see: ethical objectivism) due to rationality, and that we bind to our duty and do not expect reward (consequences) for our action. Morality arises as we act in accordance to our duty, disregarding subjectivism or consequentialism. For example, we help others not because we desire to, but because it is our duty.