Ringoringa
What difference does it make where the tourist is from? It doesn't ultimately make a difference; the fact is that this person is an idiot, regardless of where they were born. If it were, say, an Australian tourist, nobody would think it said anything about Australia. Just that one stupid individual.
I digress. This person is as dumb as a brick.
You're missing the point. Whenever you travel to another country, you're representing your country by unspoken means (without ambassador, peace speaker, etc. before your name.). That means you don't go to a different country and do something that will cause anger amongst the country natives. Not only does it cause an individual to be singled out as probably one of many idiots who shouldn't mark on their vacation list "go to a museum", but it certainly does put a blemish on that said individuals country.