Ugh, this is mind numbing and rage inducing like you have written. People have no couth, as my British Dad would say. It is hard to imagine how people can be so insensitive and why would they even bother going to a place like that in the first place when they have no sense of compassion. Other than to say they were there, I guess. I don't like traveling in groups, these are some of the reasons why. I remember in Vietnam when we were at one of the war museums and some big American was just pumped to get his photo taken on one of the tanks out in the yard while the rest of us were walking around shocked and in disbelief with it all. It's hard to comprehend what goes on in peoples minds.