I sort of agree with you. I don't think the people running that game had any bad intent, and I firmly believe that they just don't comprehend how personally the real Kristallnacht affects some people, still. I know I didn't, and in my head I didn't ever really equate it with other Holocaust-era stuff like, say, Auschwitz. And I'm older than those players, and better educated - it's just not something I was culturally aware of because I didn't grow up with a ton of Jewish friends who could've told me, "hey, I feel strongly about this personally."

That said? A lot of games have stuff that is a personal trigger for some. Even games I play in occasionally have personal trigger moments for me, as someone who was sexually assualted, but I don't think badly of those who RP them, and have RPed out rape plotlines myself because I don't equate what happened to me with fiction. I'm not saying everyone should be cool with everything in fiction, but as an actor and artist, myself, pretty much anything goes and if I'm not comfortable with reading, writing, or playing, then I don't. But I don't force my judgments upon anyone else.

Is Kristallnacht (the RP) a game I'd play in? No, because to me, it's weird. But I don't think the kids meant harm by it, and I don't think they were "getting their jollies off" on using that imagery.