For example, during World War II, scientists learned a lot from human experiments, but some of these experiments were unethical, so the technologies/innovations developed from these experiments could be considered negatives... the atomic bomb, for example.
I think you are confusing two separate issues, here. Many of the Nazi experiments, though highly unethical, produced very useful, positive contributions to science. Much of our knowledge of the effects of hypothermia, as well as of the best ways to treat chemical burns, comes from those experiments. That the knowledge was obtained through evil means does not make the knowledge itself evil. The development of the atomic bomb had little to do with human experiments, but could be viewed as negative, though even that isn't entirely obvious. You would probably want to look more generally at the ways technology can be used to harm and oppress to make your point in this case.