Maybe misleading title. I blame it on "how welcoming they are to foreigners" being a tough phrase to make into a punchier shorter phrase.

The WaPo has a write-up about it, but it's based on results of asking people in particular countries “How welcome are foreign visitors in your country?”. I don't know if the people doing the questioning controlled for any variables whatsoever, so take these results with all necessary grains of salt.