It would go for any city in which her native tongue is not spoken, where signs are sometimes are not in her native language, where there is political instability and demonstrations, and where there are a host of well-documented professional guides who make their livelihoods showing tourists the city.

I don't think this is rocket science: The further away from one's own experience, the harder it is to detect potential threats. That is why tourists all around the world make easy targets.