Should we grant gorillas the same human rights as we do newborn humans? If we do, I believe we have a big problem. You see, in the wild, gorillas travel in packs of a dominant male and many females. When the male dies or gets beaten in a fight, the new dominant male tends to do something that the peaceful description of these animals neglected to mention. The new male will brutally kill all of the infants that the other male had fathered. Gorilla infanticide is widely known and is not in dispute.
So, if we grant gorillas the same rights that we have as human beings, should we not hold them to the same moral standard as we do a human being that would exhibit this behavior? If a human man began a new relationship and the first thing he did when he moved in was to kill all of the children who lived in the house we would consider him a moral monster of the highest sort. However, when one of our "closest genetic relatives" exhibits this behavior we don't treat them the same way. If they are deserving of human rights, we should this be so?
Still think there is little difference between human beings and other animals?