The guy in the film clip is farting in the wind. The culture is becoming ever more crass and shallow and I don't see that changing any time soon. Our news media encourages it. My thought is these sites aren't being presented in an impactful way, at least not in a way that impacts "modern" visitors.
Kent in SD
On the one hand, I agree with you. I use to work in a living history museum in Toronto in the late '90s, and even though it was not even on the same plane as a place like Auschwitz in terms of historical importance (or any other kind of importance) the inappropriate behaviour of some of the tourists (either to the museum itself, the workers, the grounds, or to other tourists) really made me despair for humanity sometimes. And that was well before the rise of smartphones and selfie culture and SNS sites. I can't imagine working in tourism now, it must be very disheartening for those who see this kind of behaviour every day.
On the other hand, I don't think that giving up in the face of the vast magnitude of crass, shallow, ignorant, or entitled behaviour is the way to go either. There is a case of standing up for a higher standard, regardless of where you are. For example, I call out (sometimes loudly) people in movie theatres who talk or are on their phones after the movie has started, and have done it in multiple countries, regardless of the language spoken there (and guess what - they always put the phone away, or shut up). I call out people (kids to adults) in Starbucks, on the streets of Kyoto, anywhere, who are being incredibly rude or exhibiting other forms of bad behaviour. Now, I'm not saying I do this all the time, but I don't feel it is inappropriate to call out bad behaviour when it happens. Too many people are willing to put up with it, which just creates an illusion that it's acceptable, and more situations where people do whatever the hell they want.
Now, how this plays out for sites like Auschwitz, or 9/11 memorials, or other disaster sites, is something I think they will struggle with for a long time. I'm currently doing research into "dark" tourism and it's interesting how different sites will present themselves to the public, and how they allow the public to experience those sites. There's no "one-size-fits-all" approach in these situations. You're right in that they may have to reconsider how they present themselves to modern visitors, in order to make the experience meaningful for all.