The question of human rights has nothing to do with scientific research. Darwinism does not create nor recognise or deny rights. It's just a different field.
Exactly. If you applied that reasoning everywhere, you'd en up saying that any people believing in the theory of gravitation don't believe in human rights. Since gravitation can kill people.
It's irrelevant. Morality is a social element that comes when people lives together, and should be thought about on a social standpoint, with maybe some biological elements that are relevant to the topic (ex: survival of the specie).
Evolution theory is merely a biological theory, and should be restricted to biological talks. Unless we come to a point where stagnation of the evolutionary process of our specie because of our moral standards happens, the two talks have nothing relevant to each other.