Some people think the immoral origins of the development of racial terms should count as a reason to abandon racial terms altogether. I don't want to get into the issue of whether racial terms refer to anything, which is one of the major subjects of my dissertation, but I thought it might be nice to run through some thoughts on this secondary issue. I'll begin by asserting that I think this is an extremely poor argument for abandoning racial terms, and it's partly because I think some similar ethical arguments with very different subject matter also fail. These might take different forms, however, so I want to consider three different cases before bringing it back to race.
First, after World War II, scientists among the Allies rejected the use of the results of Nazi war crime experimentation on the grounds that the information had its origins in immoral acts. I think this argument is unfounded, relying on a confusion between two things: actions and the information that those actions happen to provide. The actions were surely wrong. But what can make the information itself bad? There is no plausible notion of moral pollution that can infect mere information without positing some spooky property Moral Pollution that somehow transfers from actions to information. I don't accept any such property. Thus this argument fails.
I want to note that it's a very different argument to say that retaining the information encourages others to do such experimentation. That doesn't rely on the magical property in question. However, it seems implausible that people will think they can get away with such awful experimentation just because information like this doesn't get burned. The scientists themselves were convicted of war crimes.