I agree with JenX, although I think a better name could have been chosen. Actually, I have more problem with the name than with the thing itself. There's no shame in historical references, but it's the acts that are to be condemned, not the objects present during their atrocities. You can make a Nazi or SS uniform, or a model of a military camp or any number of objects associated with the time period. How they are presented though, is the thing. If I were you, I'd be more worried about how people use/present them than the model itself.

Laurie