Is there any chance the ones making all the ruckus and disrespect were non-Jewish Israelis? That's not an excuse but it makes it make more sense than actual Jews being so disrespectful. And if it is young Jews doing it, can you make it make sense? Do you have some sense for why / how they might be thinking?
Keeping in mind just being bad tourists doesn't quite explain it. Kids groups tend to be shite tourists no matter where they are from. But even I knew as a 10yo not to act stupid when visiting some of the more somber locations I went to in the US; no less as a 21yo when I visited Dachau as a non-Jew.
[sigh] I'll never understand this world.