We refused to use the Nazi data for two reasons Ethics, and it was shit-quality, largely just games pychopaths played with human lives. Now, we don't have ethics, and all science is bad method and goosey data, you just jump and and down and declare it true. You will find 100s of papers from decades ago on why scientists should refuse to use Nazi data. For example, The Nazi doctors throwing Jewish men in to freezing waters to the death to "study" the effects. 

Medicine had a brief decade or so of ethics.