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Also not so sure about the "right to live on this planet". On a closed biosphere, you'll often see one species kill off (intentionally or not) another, especially if they compete for the same resources. Nobody has a "right" to exist. You fight to exist, or die trying. Law of the jungle i'm afraid, no fluffy bunny stuff will save you when you're about to starve.
I see your reference to other species killing each other and the relation to the human race, but are we the same as other species? People seem to want to call us the superior species when it suits them. Animals fight for the right to survive, and on a very basic level, so do we. But in many ways we have transcended this, and become self aware of our own actions. If an animal kills another it is for survival. It doesn't think about the impact on the environment, where as we know what we're doing, yet we continue to do so.
