Note a subtle difference...I am arguing for honesty and clarity so people can make an informed decision on the issue rather than a decision based on misinformation.
If people were claiming that the lampshades were from Jews being killed out back right then, then that's not true. Whether old skins should be used or not is a different question, and I'm sure that you see that the use you mention (horrid!) is rather different from the transplanted use of an organ from someone who has already died (not horrid, in MY view).
There is a moral difference between a person who has “died,” and a person who has been murdered for their organs.
And my chosen parallel is exact. Skin is an organ, and embryonic stem cells are the pluripotent cells that, if not ghoulishly “harvested,” would have made up the organs of the child.
So you don’t see any moral problem with, for the purposes of experimentation or therapy, using the organs of persons who were murdered to obtain those organs?