I’d say that merely going to see this exhibit, is tantamount to committing a sin. The “its educational argument shouldn’t fly.” We could view pornography as “educational” from a certain point of view. Learning about life does not mean you need to “experience” everything. These people are entitled to a decent burial and rest, as every human being is.
The same thing goes for the bodies that are dug up by archaeologists. They started this. I don't want someone in the year 3000 digging up my parents' graves and putting their skeletons on display in a museum.