Concerning your topic, I would fall on the side of using the data as morally acceptable.

My first pass, gut-level check is to imagine how I would feel if I or one of my children was one of the one’s experimented on. I can not imagine any grief about other’s studying or benefiting from the experimentation, as long as they understood that the way the data was collected was wicked and condemn those same methods.

My second pass is to consider the 2 foundations for ethics: 1) loving God and 2) loving your neighbor. Does this pursuit of medical knowlege derived from wicked acts, hurt God or others, or does the pursuit benefit both God and others. I see only the latter applying.

I think if we exclude on moral grounds, learning medical lessons from the Nazi experiments, then we also have to exclude on the same grounds, learning moral lessons, from the Nazi experiments, which is exactly what we are doing right now.