I think it's pretty clear that scientific conclusions can be dangerous in the sense that telling everybody about them is dangerous. For example, the possibility of nuclear weapons. On the other hand, there should probably be an ethical injunction against deciding what kind of science other people get to do. (But in return maybe scientists themselves should think more carefully about whether what they're doing is going to kill the human race or not.)
That's the thing, the science wasn't good or bad, it was the to decision to give the results to certain people that held that quality of good/bad. And it was very, very bad. But the process of looking at the world, wondering how it works, then figuring out how it works, and then making it work the way you desire, that process carries with it no intrinsic moral qualities.
Another monthly installment of the rationality quotes thread. The usual rules apply: