Why would you put the original comment as a question if you're being rhetorical and it's obvious people disagree with you?

There's a reason we don't use the research from Josef Mengele.

There is, but it's largely that his "research" was unscientific crap.

The US readily gave the equally brutal Japanese Unit 731 physicians immunity in exchange for their human experiment data on bioweapons.

https://en.wikipedia.org/wiki/Unit_731#American_grant_of_imm...

Was unaware of Unit 731, thank you for the knowledge!

We use plenty of research from Nazi scientists, that's actually a horrible example, lol.